May 16, 2024 dirvel

How do trees and green spaces enhance our health?

Green, leafy trees with brown trunks in a park and rays of golden sunlight pouring down through the leaves

Trees enhance life in a multitude of ways. They combat climate change by reducing greenhouse gases in the atmosphere. They muffle sound pollution and reduce air pollution, drawing in carbon dioxide and releasing oxygen. When rain pours from the skies, trees decrease stormwater runoff, preventing flooding and soil erosion. They also provide valuable habitats to support biodiversity in insects, birds, and other animals, and microorganisms. The list goes on.

Equally important is accumulating evidence that simply spending time around trees and green spaces uplifts our health and mood. Below are a few of the biggest benefits we reap.

Keeping it cool: Trees help prevent heat-related illness

Climate change is causing rising temperatures and more heat waves across the US. These effects are worse for those who live in neighborhoods known as urban heat islands, where asphalt and concrete soak up heat during the day and continue to radiate it at night. Temperatures can reach 7° F hotter than suburban, rural, or simply wealthier and leafier neighborhoods.

Trees and their leafy canopy provide shade that helps to prevent urban heat islands. What does that mean for individuals? It translates to fewer heat-related health illnesses, which strike outdoor workers and younger, older, and medically vulnerable people more often. A study published in The Lancet calculated that increasing tree canopy to 30% coverage in 93 European cities could prevent an estimated four in 10 premature heat-related deaths in adults in those cities.

How trees help children: Better mood, behavior, attention, and more

Spending more time in nature has been linked with better health outcomes like lower blood pressure, better sleep, and improvement in many chronic conditions in adults. These findings are prompting a growing interest in forest therapy, a guided outdoor healing practice that leads to overall improved well-being. But what’s also remarkable are the varied benefits of trees and nature for children.

One study of children 4 to 6 years old found that those who lived close to green space demonstrated less hyperactive behavior and scored more highly on attention and visual memory testing measures compared with children who did not.

Just seeing trees can have mental health benefits. In Michigan, a study of children between the ages of 7 and 9 demonstrated that students who could see trees from their school windows had fewer behavioral problems than those with limited views.

In Finland, researchers modified daycare outdoor playscape environments to mimic the forest undergrowth. These daycares were compared to control standard daycares and nature-oriented daycares where children made daily visits to nearby forests. At the end of 28 days, the children in the daycares with modified forest undergrowth playscapes harbored a healthier microbiome and had improved markers of their immune systems as compared to their counterparts.

How green space helps communities

Having green space in neighborhoods also does a lot to enrich the well-being of communities. A randomized trial in a US city planted and maintained grass and trees in previously vacant lots. Researchers then compared these green spaces to lots that were left alone.

In neighborhoods below the poverty line, there was a reduction in crime for areas with greened lots compared to untouched vacant lots. Meanwhile, residents who lived near lots that were greened reported feeling safer and increased their use of the outside space for relaxing and socializing.

How can you help?

Unfortunately, urban tree canopy cover has been declining over the years. To counter this decline, many towns and nonprofit organizations have programs that provide trees for planting.

A few examples in Massachusetts are Canopy Crew in Cambridge and Speak for the Trees in Boston. (Speak for the Trees also offers helpful information on selecting and caring for trees). Neighborhood Forest provides trees for schools and other youth organizations across the US. Look for a program near you!

Planting trees native to your region will better suit the local conditions, wildlife, and ecosystem. Contact your regional Native Plant Society for more information and guidance. If you are worried about seasonal allergies from tree pollen, many tree organizations or certified arborists can give you guidance on the best native tree selections.

If planting trees is not for you but you are interested in contributing to the mission, consider donating to organizations that support reforestation, like The Canopy Project and the Arbor Day Foundation.

About the Author

photo of Wynne Armand, MD

Wynne Armand, MD, Contributor

Dr. Wynne Armand is a physician at Massachusetts General Hospital (MGH), where she provides primary care; an assistant professor in medicine at Harvard Medical School; and associate director of the MGH Center for the Environment and … See Full Bio View all posts by Wynne Armand, MD

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May 5, 2024 dirvel

Moving from couch to 5K

point-of-view photo looking down at the feet of a woman as she tightens the yellow laces on a raspberry-colored running shoe; also visible are a wood floor and her turquoise smartwatch strap

Need a little motivation and structure to ramp up your walking routine? Want to wake up your workouts but not quite ready for a mud run? Consider trying a couch-to-5K program.

Dr. Adam Tenforde, medical director of the Spaulding National Running Center at Harvard-affiliated Spaulding Rehabilitation Network and a sports medicine physician at Mass General Brigham Sports Medicine, shares tips on what to know and do before lacing up your sneakers.

What is a couch-to-5K program?

These free or low-cost coaching plans are designed to help would-be runners train for a 5-kilometer race, which is about 3.1 miles. The programs are available online, or as apps or podcasts. They typically feature timed walking and running intervals that gradually phase out the walking over a period of about nine weeks.

Why try a couch-to-5K program?

“One purpose of a couch-to-5K program is to give you time to acclimate and start to enjoy the benefits of running and the sense of accomplishment of completing a distance safely,” says Dr. Tenforde. Running provides many cardiovascular benefits, such as lower blood pressure and a reduced cholesterol level, as well as an enhanced sense of well-being, he adds.

What’s more, adding even short bursts of running or other vigorous physical activity to a workout — a practice known as high-intensity interval training or HIIT — appears to help improve mental health, according to a study that pooled findings from 58 randomized trials of HIIT.

Are you ready to tackle a couch-to-5K?

Even though the couch-to-5K programs sound as though they’re geared for completely sedentary couch potatoes, that’s not necessarily true, Dr. Tenforde cautions. These programs often assume you can walk continuously for 30 minutes, which doesn’t apply to everyone.

For some people, an even easier, more gradual training regimen may be more appropriate. Also, keep in mind that you don’t have to run to do a 5K. Many of these races also encourage walkers to participate as well. You’ll still reap the other rewards from committing to a race, such as being more challenged and motivated — and possibly more connected to your community. Many charitable “fun runs” benefit local schools or needy families. Some are in memory of people affected by illness or tragedy. Visit Running in the USA to find 5K races near you.

What to do before you start

If you’re planning to walk or run your first 5K, get your doctor’s approval before you start training. That’s especially important if you have heart disease or are at risk for it.

Comfortable walking or running shoes are a wise investment. Shoes that are too old or too tight in the toe box can cause or aggravate a bunion, a bony bump at the outer base of the big toe. Despite suggestions that people with flat feet or high arches need specific types of shoes, studies have found that neutral shoes (designed for average feet) work well for almost everyone. Walk or jog around the store when you try them on to make sure they feel good and fit properly.

You don’t need to buy special clothes; regular sweat pants or comfortable shorts and a t-shirt will suffice. Women should consider getting a supportive sports bra, however.

Go slow and steady when training

  • Always include a warm-up and cool-down — a few minutes of slow walking or jogging — with every exercise session.
  • If you haven’t been exercising regularly, start by walking just five or 10 minutes a day, three days a week. Or, if you’re already a regular walker, add some short stints of jogging to each walking session.
  • Gradually add minutes and days over the following four to six weeks.
  • Once you’re up to 30 minutes a day, check how far you’re traveling. Keep increasing your distance every week until you reach 5 kilometers. Then slowly phase in more jogging and less walking over your route if you like.

Remember that you can always repeat a week. You’re less likely to sustain an injury if you make slow, steady progress. Pay close attention to your body and don’t push yourself too much, Dr. Tenforde advises. Former athletes who haven’t run in years may think they can pick up where they left off, but that’s not a smart move — they should also start low and go slow.

For a good couch-to-5K guide, try this beginner’s program from the United Kingdom’s National Health Service.

About the Author

photo of Julie Corliss

Julie Corliss, Executive Editor, Harvard Heart Letter

Julie Corliss is the executive editor of the Harvard Heart Letter. Before working at Harvard, she was a medical writer and editor at HealthNews, a consumer newsletter affiliated with The New England Journal of Medicine. She … See Full Bio View all posts by Julie Corliss

About the Reviewer

photo of Howard E. LeWine, MD

Howard E. LeWine, MD, Chief Medical Editor, Harvard Health Publishing

Dr. Howard LeWine is a practicing internist at Brigham and Women’s Hospital in Boston, Chief Medical Editor at Harvard Health Publishing, and editor in chief of Harvard Men’s Health Watch. See Full Bio View all posts by Howard E. LeWine, MD

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April 11, 2024 dirvel

Virtual mental health care visits: Making them work for you

Young man dressed in yellow and white striped shirt on white couch holding tablet and gesturing during online mental health visit

Before the pandemic, talking to a therapist or psychiatrist on a video call was novel. Now it’s fairly common. One recent analysis, for example, found that video appointments within the massive Veterans Affairs Health Care System jumped from about 2% of all mental health care encounters in January 2019 to 35% of these encounters in August 2023.

What are some advantages and disadvantages of virtual mental health care visits? Does seeing a therapist or psychiatrist by video instead of in person affect your response to treatment? If you haven’t yet used virtual mental health counseling, what do you need to know? Below, Stephanie Collier, MD, MPH, a psychiatrist at Harvard-affiliated McLean Hospital, shares her expertise and insights.

What are some advantages of virtual mental health visits?

Virtual visits are convenient for many people, including those who might have trouble getting to an office or who live in areas where it’s not easy to find mental health care providers.

“You can chat with your mental health care clinician in the setting of your choice, which might make you feel more comfortable,” says Dr. Collier. “You don’t have to worry about getting to and from an appointment. And you can be confident that your outcome will be similar to receiving in-person treatment. For example, in a 2022 study of about 1,500 people, participants being treated for anxiety or depression reported the same level of symptom improvement on standardized scales, whether they received virtual or in-person treatment.”

How do virtual visits work?

A virtual visit with a mental health care clinician works in much the same way as a virtual visit with your doctor.

You make an appointment to speak with an expert, typically a licensed therapist, psychologist, or psychiatrist. They may be in a private practice or work with your insurance plan or a hospital system. Or they might be affiliated with an online mental health care platform. Often, you can read a bit about their professional background, expertise, and other information to help you decide if they are a good fit for your needs.

Shortly before your appointment, you’ll log on to a specified video platform, and then find yourself in a virtual waiting room. When it’s time for your session, the expert will appear on the screen and conduct a 30- to 50-minute session, depending on what you’ve agreed on, just as they would during an office visit.

Will your insurance pay for virtual visits?

Not necessarily. Make sure your sessions will be covered. Medicare and Medicaid cover virtual mental health care visits, but not all private insurers cover the service. Even if you think you’re covered, double-check in advance.

What should you check on ahead of time?

Getting ready for a virtual visit involves prepping for both a mental health appointment and a video meeting.

  • Go over the instructions. The mental health care clinician should give you instructions for accessing the platform where the virtual visit will take place. If you don’t have instructions, contact the clinician’s office or the online service to get them.
  • Look for compliance. The platform your clinician specifies for your session should clearly state if it’s HIPAA-compliant, ensuring the privacy and security of your information. If you don’t see any evidence of HIPAA compliance, ask your clinician about it or consider choosing another mental health provider.
  • Do an equipment inventory. You’ll need a smartphone, tablet, desktop computer, or laptop to take part in a virtual mental health care visit.The device needs a camera, a microphone, and an internet connection.You’ll also need a quiet space (so you and the expert can hear each other) and decent lighting (so the expert will be able to see you).
  • Do a practice run. Well before your appointment, log on to the platform your clinician has specified. Check to see if you need to upgrade your software in order to use the platform. You don’t want any surprises just before appointment time. Try out the volume and your camera angle.

How can you help make video sessions work well for you?

When you have an in-person visit, it may be easier to see body language and express yourself. But many people –– especially younger people –– feel very comfortable online. And others might find the technology and apps easier to navigate with a little guidance.

Here are some tips to ensure that you’re seen and heard.

  • Set a reminder to charge your equipment. The device you use should be well charged or plugged in to an electrical outlet for the appointment.
  • Gather some supplies. You might want to have a drink of water, a box of tissues, and a pad and pen handy for taking notes.
  • Make a list of questions or topics on your mind. “Think of a few topics you want to discuss in advance, so you can get through them during your session,” Dr. Collier says. “If you keep a journal or sleep log, and the information will be important, have it with you at appointment time.”
  • Be willing to share your thoughts and emotions. You won’t have to carry the whole conversation. Your therapist will ask you questions and prompts to guide the session and help you open up about your feelings and experiences. For instance, they might ask, “How has your mood been since our last session?” or “What are some challenges you faced this week?”
  • If you like, ask a friend to join you. If you’ll feel more comfortable with a friend in the room to support you or help you with the technology, arrange it in advance. During your appointment, tell the expert that someone else is there with you.
  • Be patient. Sometimes experts run late. That means you might be stuck in an online waiting room, wondering if the appointment is still on. Dr. Collier advises waiting for about 10 minutes, and then leaving a voice message (if possible) or an email for your expert, explaining the situation.

Should you make another appointment?

If you feel your appointment was productive, consider scheduling another one. Again, make sure your insurance will cover it.

What if you didn’t “click” with the expert? “It’s an important consideration, since your relationship with your therapist is the best predictor of how you’ll do in therapy. So give it a few sessions. If you still don’t think your therapist is a good fit, it’s ok to change clinicians. Many telehealth platforms allow you to do that pretty easily.”

About the Author

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Heidi Godman, Executive Editor, Harvard Health Letter

Heidi Godman is the executive editor of the Harvard Health Letter. Before coming to the Health Letter, she was an award-winning television news anchor and medical reporter for 25 years. Heidi was named a journalism fellow … See Full Bio View all posts by Heidi Godman

About the Reviewer

photo of Howard E. LeWine, MD

Howard E. LeWine, MD, Chief Medical Editor, Harvard Health Publishing

Dr. Howard LeWine is a practicing internist at Brigham and Women’s Hospital in Boston, Chief Medical Editor at Harvard Health Publishing, and editor in chief of Harvard Men’s Health Watch. See Full Bio View all posts by Howard E. LeWine, MD

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March 28, 2024 dirvel

A muscle-building obsession in boys: What to know and do

A shadowy, heavily-muscled superhero in a red cape strikes an action pose against a red and orange background; concept is body dysmorphic disorder

By the time boys are 8 or 10, they’re steeped in Marvel action heroes with bulging, oversized muscles and rock-hard abs. By adolescence, they’re deluged with social media streams of bulked-up male bodies.

The underlying messages about power and worth prompt many boys to worry and wonder about how to measure up. Sometimes, negative thoughts and concerns even interfere with daily life, a mental health issue known body dysmorphic disorder, or body dysmorphia. The most common form of this in boys is muscle dysmorphia.

What is muscle dysmorphia?

Muscle dysmorphia is marked by preoccupation with a muscular and lean physique. While the more extreme behaviors that define this disorder appear only in a small percentage of boys and young men, it may color the mindset of many more.

Nearly a quarter of boys and young men engage in some type of muscle-building behaviors. “About 60% of young boys in the United States mention changing their diet to become more muscular,” says Dr. Gabriela Vargas, director of the Young Men’s Health website at Boston Children’s Hospital. “While that may not meet the diagnostic criteria of muscle dysmorphia disorder, it’s impacting a lot of young men.”

“There’s a social norm that equates muscularity with masculinity,” Dr. Vargas adds. “Even Halloween costumes for 4- and 5-year-old boys now have padding for six-pack abs. There’s constant messaging that this is what their bodies should look like.”

Does body dysmorphic disorder differ in boys and girls?

Long believed to be the domain of girls, body dysmorphia can take the form of eating disorders such as anorexia or bulimia. Technically, muscle dysmorphia is not an eating disorder. But it is far more pervasive in males — and insidious.

“The common notion is that body dysmorphia just affects girls and isn’t a male issue,” Dr. Vargas says. “Because of that, these unhealthy behaviors in boys often go overlooked.”

What are the signs of body dysmorphia in boys?

Parents may have a tough time discerning whether their son is merely being a teen or veering into dangerous territory. Dr. Vargas advises parents to look for these red flags:

  • Marked change in physical routines, such as going from working out once a day to spending hours working out every day.
  • Following regimented workouts or meals, including limiting the foods they’re eating or concentrating heavily on high-protein options.
  • Disrupting normal activities, such as spending time with friends, to work out instead.
  • Obsessively taking photos of their muscles or abdomen to track “improvement.”
  • Weighing himself multiple times a day.
  • Dressing to highlight a more muscular physique, or wearing baggier clothes to hide their physique because they don’t think it’s good enough.

“Nearly everyone has been on a diet,” Dr. Vargas says. “The difference with this is persistence — they don’t just try it for a week and then decide it’s not for them. These boys are doing this for weeks to months, and they’re not flexible in changing their behaviors.”

What are the health dangers of muscle dysmorphia in boys?

Extreme behaviors can pose physical and mental health risks.

For example, unregulated protein powders and supplements boys turn to in hopes of quickly bulking up muscles may be adulterated with stimulants or even anabolic steroids. “With that comes an increased risk of stroke, heart palpitations, high blood pressure, and liver injury,” notes Dr. Vargas.

Some boys also attempt to gain muscle through a “bulk and cut” regimen, with periods of rapid weight gain followed by periods of extreme calorie limitation. This can affect long-term muscle and bone development and lead to irregular heartbeat and lower testosterone levels.

“Even in a best-case scenario, eating too much protein can lead to a lot of intestinal distress, such as diarrhea, or to kidney injury, since our kidneys are not meant to filter out excessive amounts of protein,” Dr. Vargas says.

The psychological fallout can also be dramatic. Depression and suicidal thoughts are more common in people who are malnourished, which may occur when boys drastically cut calories or neglect entire food groups. Additionally, as they try to achieve unrealistic ideals, they may constantly feel like they’re not good enough.

How can parents encourage a healthy body image in boys?

These tips can help:

  • Gather for family meals. Schedules can be tricky. Yet considerable research shows physical and mental health benefits flow from sitting down together for meals, including a greater likelihood of children being an appropriate weight for their body type.
  • Don’t comment on body shape or size. “It’s a lot easier said than done, but this means your own body, your child’s, or others in the community,” says Dr. Vargas.
  • Frame nutrition and exercise as meaningful for health. When you talk with your son about what you eat or your exercise routine, don’t tie hoped-for results to body shape or size.
  • Communicate openly. “If your son says he wants to exercise more or increase his protein intake, ask why — for his overall health, or a specific body ideal?”
  • Don’t buy protein supplements. It’s harder for boys to obtain them when parents won’t allow them in the house. “One alternative is to talk with your son’s primary care doctor or a dietitian, who can be a great resource on how to get protein through regular foods,” Dr. Vargas says.

About the Author

photo of Maureen Salamon

Maureen Salamon, Executive Editor, Harvard Women's Health Watch

Maureen Salamon is executive editor of Harvard Women’s Health Watch. She began her career as a newspaper reporter and later covered health and medicine for a wide variety of websites, magazines, and hospitals. Her work has … See Full Bio View all posts by Maureen Salamon

About the Reviewer

photo of Howard E. LeWine, MD

Howard E. LeWine, MD, Chief Medical Editor, Harvard Health Publishing

Dr. Howard LeWine is a practicing internist at Brigham and Women’s Hospital in Boston, Chief Medical Editor at Harvard Health Publishing, and editor in chief of Harvard Men’s Health Watch. See Full Bio View all posts by Howard E. LeWine, MD

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March 12, 2024 dirvel

Sexually transmitted infections: What parents need to be sure their teens know

A conceptual drawing of a kiss showing two young people from below the knees, one on tiptoes in untied red sneakers and cropped pants, one in black sneakers

It’s never easy for parents to talk to their teens about having sex. Many parents feel that talking about it is the same as condoning it, so they are hesitant to do so. But according to the most recent Youth Risk Behavior Survey (YRBS), a national survey of high school students, by the end of high school 30% have had sex.

It can be impossible to know for sure if your teen has had sex. Even if they haven’t, it’s likely that at some point they will — and they need to have information to help keep themselves safe and healthy.

What parents should know about sexually transmitted infections

Sexually transmitted infections, or STIs, are very common. They may be caused by bacteria, viruses, or other microorganisms, and spread through all kinds of sex. While most STIs are treatable, they can affect fertility in both women and men, can cause health problems for a baby during pregnancy, and can sometimes lead to lifelong infection or serious complications. That’s why teens need to know about them.

Below are the high-level facts about some of the most common infections: what causes them, what symptoms may occur, and how they are treated.

Chlamydia

Chlamydia is the most frequently reported bacterial STI in the United States — but just as many cases are asymptomatic, so the numbers may be higher than we realize.

Symptoms, if they are present, can include discharge from the vagina or penis, pain with urination, or pain and swelling of the testicles (this is rare). A test of the urine (or a swab from the affected area) can diagnose it, and it is curable with antibiotics. If left untreated it can lead to infertility, more commonly in women than men.

Gonorrhea

Gonorrhea is another STI caused by a bacteria, and it can also be asymptomatic. When symptoms occur, they are very similar to chlamydia. Gonorrhea also can cause infertility in both women and men. While it is treatable, some infections have been resistant to the usual antibiotics used, so additional testing and treatment is sometimes needed.

Trichomoniasis

Trichomoniasis is caused by a protozoa. It is another STI that can be asymptomatic. When there are symptoms, they are usually itch, irritation, and discharge. It is curable with medication.

Syphilis

Syphilis has been on the rise. In the first stage of infection there is usually a firm, round, painless sore where the infection entered the body. The sore is generally there for three to six weeks, but as it is painless it may go unnoticed.

In the second stage there is a more extensive rash, though it can be faint and go unnoticed, along with general feelings of illness such as fever, sore throat, fatigue, swollen lymph nodes, or weight loss.

If syphilis still goes unnoticed it can linger in the body for years, sometimes affecting organ systems, including the brain. It is curable with antibiotics, but if found late the damage it can do may be permanent. This infection can be very serious during pregnancy.

HSV

HSV (herpes simplex virus) causes blistering sores. There is both oral herpes (mouth sores) and genital herpes. Oral herpes, caused by HSV1, is not usually caused by sex — but it can lead to genital herpes through oral sex. Genital herpes is more commonly caused by HSV2.

The sores of herpes can recur throughout life. There is no cure for herpes, but there are medications that can shorten or prevent outbreaks. This infection can be particularly dangerous during pregnancy, although the risks can be managed with good prenatal care.

HPV

HPV (human papilloma virus) is the most common sexually transmitted infection. It can be transmitted even by close skin-to-skin touch, and infections are generally asymptomatic.

Most cases of HPV (90%) get better by themselves — but if they don’t, over time the virus can cause genital warts or certain cancers. Luckily, there is an effective vaccine to prevent HPV that can be given starting at age 9.

HIV

HIV (human immunodeficiency virus) is more common among people who have other STIs — mostly because having STIs is a sign of risky sexual behavior. It can be very hard to know if a person has it, because the early symptoms can feel like having the flu, and then people can move into a long period of time of having no symptoms at all.

While there is no cure for HIV, there are medications to control it, as well as medications that can prevent it.

Talking to teens about preventing STIs

All of this sounds scary. But there are actually some simple things teens can do to prevent infections or minimize complications, which is why parents need to talk with them.

Teens can:

  • Use condoms every single time they have sex — and use them properly. According to the report mentioned above, about half of sexually active high schoolers don’t use condoms regularly.
  • Limit their number of sexual partners — and have frank conversations with those partners before having sex. Asking about sexual history, and getting testing before starting a sexual relationship, can make a difference.
  • Get tested regularly. Sexually active teens should be tested for gonorrhea and chlamydia every year, or more frequently based on their sexual history or symptoms. Testing for other infections may be a good idea too. In the YRBS, 95% of high schoolers had not been tested for STIs in the past year, which is frightening given that nearly a third report being sexually active.

Make sure your teen sees their doctor regularly. And encourage them to be honest with their doctor during their visits. As a parent, you can help by giving your teen confidential time alone with the doctor.

About the Author

photo of Claire McCarthy, MD

Claire McCarthy, MD, Senior Faculty Editor, Harvard Health Publishing

Claire McCarthy, MD, is a primary care pediatrician at Boston Children’s Hospital, and an assistant professor of pediatrics at Harvard Medical School. In addition to being a senior faculty editor for Harvard Health Publishing, Dr. McCarthy … See Full Bio View all posts by Claire McCarthy, MD

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March 2, 2024 dirvel

Strong legs help power summer activities: Hiking, biking, swimming, and more

Older woman wearing black cycling clothes and a blue helmet riding a bicycle on a roadway with flowering trees bushes and tress lining the roadside

My favorite summer activities officially kick in when the calendar flips to May. It's prime time for open water swimming, running, cycling, hiking, and anything else that gets me outside and moving. Yet, my first step is to get my legs in shape.

“Legs are the foundation for most activities,” says Vijay Daryanani, a physical therapist at Harvard-affiliated Spaulding Rehabilitation Hospital. “They're home to some of the body’s largest muscles, and building healthy legs can improve one’s performance, reduce injury, and increase endurance.”

Four leg muscle groups to build for summer activities

Four muscles do the most leg work: quadriceps, gluteus maximus (glutes), hamstrings, and calves. Here is a look at each.

Quadriceps (quads). Also known as the thigh muscles, the quads are a group of four muscles (hence the prefix "quad'). They extend your leg at the knee and power every leg action: stand, walk, run, kick, and climb.

Glutes. The body’s largest muscles, the glutes (your buttock muscles) keep you upright and help the hips and thighs propel your body forward.

Hamstrings. The hamstrings are a group of three muscles that run along the back of your thighs from the hip to just below the knee. They allow you to extend your leg straight behind your body and support hip and knee movements.

Calves. Three muscles make up the calf, which sits in the back of the lower leg, beginning below the knee and extending to the ankle. They work together to move your foot and lower leg and push you forward when you walk or run.

Spotlight muscle strength and length

Strength and length are the most important focus for building summer-ready legs, says Daryanani. “Strengthening leg muscles increases power and endurance, and lengthening them improves flexibility to protect against injury.”

If you are new to exercise or returning to it after time off, first get your legs accustomed to daily movement. “Start simply by walking around your home nonstop for several minutes each day, or climbing up and down stairs,” says Daryanani.

After that, adopt a walking routine. Every day, walk at a moderate pace for 20 to 30 minutes. You can focus on covering a specific distance (like one or two miles) or taking a certain number of steps by tracking them on your smartphone or fitness tracker. You won’t just build leg strength — you’ll reap a wide range of health benefits.

There are many different leg muscle-building exercises, some focused on specific activities or sports. Below is a three-move routine that targets the four key leg muscles. Add them to your regular workout or do them as a leg-only routine several times a week. (If you have any mobility issues, especially knee or ankle problems, check with your doctor before starting.)

To help lengthen your leg muscles and increase flexibility, try this daily stretching routine that includes several lower-body stretches.

Dumbbell squats

Muscles worked: glutes and quads

Reps: 8-12

Sets: 1-2

Rest: 30-90 seconds between sets

Starting position: Stand with your feet apart. Hold a weight in each hand with your arms at your sides and palms facing inward.

Movement: Slowly bend your hips and knees, leaning forward no more than 45 degrees and lowering your buttocks down and back about eight inches. Pause. Slowly rise to an upright position.

Tips and techniques:

  • Don’t round or excessively arch your back

Make it easier: Do the move without holding weights.

Make it harder: Lower yourself at a normal pace. Hold briefly. Stand up quickly.

Reverse lunge

Muscles worked: quads, glutes, hamstrings

Reps: 8-12

Sets: 1-3

Rest: 30-90 seconds between sets

Starting position: Stand straight with your feet together and your arms at your sides, holding dumbbells.

Movement: Step back onto the ball of your left foot, bend your knees, and lower into a lunge. Your right knee should align over your right ankle, and your left knee should point toward (but not touch) the floor. Push off your left foot to stand and return to the starting position. Repeat, stepping back with your right foot to do the lunge on the opposite side. This is one rep.

Tips and techniques:

  • Keep your spine neutral when lowering into the lunge.
  • Don't lean forward or back.
  • As you bend your knees, lower the back knee directly down toward the floor with the thigh perpendicular to the floor.

Make it easier: Do lunges without weights.

Make it harder: Step forward into the lunges, or use heavier weights.

Calf raises

Muscles worked: calves

Reps: 8-12

Sets: 1-2

Rest: 30 seconds between sets

Starting position: Stand with your feet flat on the floor. Hold on to the back of a chair for balance.

Movement: Raise yourself up on the balls of your feet as high as possible. Hold briefly, then lower yourself.

Make it easier: Lift your heels less high off the floor.

Make it harder: Do one-leg calf raises. Tuck one foot behind the other calf before rising on the ball of your foot; do sets for each leg. Or try doing calf raises without holding on to a chair.

About the Author

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Matthew Solan, Executive Editor, Harvard Men's Health Watch

Matthew Solan is the executive editor of Harvard Men’s Health Watch. He previously served as executive editor for UCLA Health’s Healthy Years and as a contributor to Duke Medicine’s Health News and Weill Cornell Medical College’s … See Full Bio View all posts by Matthew Solan

About the Reviewer

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Howard E. LeWine, MD, Chief Medical Editor, Harvard Health Publishing

Dr. Howard LeWine is a practicing internist at Brigham and Women’s Hospital in Boston, Chief Medical Editor at Harvard Health Publishing, and editor in chief of Harvard Men’s Health Watch. See Full Bio View all posts by Howard E. LeWine, MD

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January 22, 2024 dirvel

New urine test may help some men with elevated PSA avoid biopsy

photo of a rack of test tubes with different colored caps, with a gloved hand inserting a tube into the rack; in the background, out of focus, the lab tech's face is slightly visible

When a prostate-specific antigen (PSA) blood test produces an abnormal result, the next step is usually a prostate biopsy. A biopsy can confirm or rule out a cancer diagnosis, but it also has certain drawbacks. Prostate biopsies are invasive procedures with potential side effects, and they often detect low-grade, slow-growing tumors that may not need immediate treatment — or any treatment at all.

Researchers are exploring various strategies for avoiding unnecessary biopsies. Specialized magnetic resonance imaging (MRI) scans, for instance, can be useful for predicting if a man’s tumor is likely to spread. A blood test called the Prostate Health Index (PHI) measures various forms of PSA, and can help doctors determine if a biopsy is needed.

In April, researchers at the University of Michigan published results with a test that screens for prostate cancer in urine samples. Called the MyProstateScore 2.0 (MPS2) test, it looks for 18 different genes associated with high-grade tumors. “If you’re negative on this test, it’s almost certain that you don’t have aggressive prostate cancer,” said Dr. Arul Chinnaiyan, a professor of pathology and urology at the University, in a press release.

Gathering data and further testing

To create the test, Dr. Chinnaiyan and his colleagues first turned to publicly-available databases containing over 58,000 prostate cancer-associated genes. From that initial pool, they narrowed down to 54 genes that are uniquely overexpressed in cancers classified as Grade Group 2 (GG2) or higher. The Grade Group system ranks prostate cancers from GG1 (the least dangerous) to GG5 (the most dangerous).

The team tested those 54 genes against archived urine samples from 761 men with elevated PSA who were scheduled for biopsy. This effort yielded 18 genes that consistently correlated with high-grade cancer in the biopsy specimens. These genes now make up MPS2.

Then the team validated the test by performing MPS2 testing on over 800 archived urine samples collected by a national prostate cancer research consortium. Other researchers affiliated with that consortium assessed the new urine test’s results against patient records.

Interpreting the results

Study findings showed that MPS2 correctly identified 95% of the GG2 prostate cancers and 99% of cancers that were GG3 or higher. Test accuracy was further improved by incorporating estimates of the prostate’s size (or volume, as it’s also called).

According to the team’s calculations, use of the MPS2 would have reduced unnecessary biopsies by 37%. If volume was included in the measure, then 41% of biopsies would have been avoided. By comparison, just 26% of biopsies would have been avoided with the PHI.

Dr. Chinnaiyan and his co-authors emphasize that ruling out high-grade cancer with a urine test offers some advantages over MRI. The specialized multi-parametric MRI scans needed to assess high-grade cancer in men with elevated PSA aren’t always available in community settings, for instance. Moreover, the interpretation of mpMRI results can vary from one radiologist to another. Importantly, the MPS2 can be updated over time as new prostate-cancer genes are identified.

Commentary

Dr. Boris Gershman, a urologist at Harvard-affiliated Beth Israel Deaconess Medical Center in Boston, and a member of the advisory and editorial board for the Harvard Medical School Guide to Prostate Diseases, described the new study results as promising. “It does appear that the performance of the 18-gene urine test is better than PSA alone,” he says.

But Dr. Gershman adds that it will be important to consider how such a test will fit into the current two-stage approach for PSA screening, which entails prostate MRI when the PSA is abnormal. Where MRI delivers a yes/no result (meaning lesions that look suspicious for cancer are either present or not), the MPS2 provides numerical risk estimates ranging between 0% and 100%. “The challenge with clinical implementation of a continuous risk score is where to draw the line for biopsy,” Dr. Gershman says.

“This research is very encouraging, since many men in rural areas may not have access to prostate MRI machines or the added sophistication that is needed in interpreting these MRI scans,” says Dr. Marc Garnick, the Gorman Brothers Professor of Medicine at Harvard Medical School and Beth Israel Deaconess Medical Center. “A widely available urine test may eventually help provide more precision in determining who should undergo a prostate biopsy, and may also help to assess the probability that a cancer is clinically significant and in need of treatment.”

About the Author

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Charlie Schmidt, Editor, Harvard Medical School Annual Report on Prostate Diseases

Charlie Schmidt is an award-winning freelance science writer based in Portland, Maine. In addition to writing for Harvard Health Publishing, Charlie has written for Science magazine, the Journal of the National Cancer Institute, Environmental Health Perspectives, … See Full Bio View all posts by Charlie Schmidt

About the Reviewer

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Marc B. Garnick, MD, Editor in Chief, Harvard Medical School Annual Report on Prostate Diseases; Editorial Advisory Board Member, Harvard Health Publishing

Dr. Marc B. Garnick is an internationally renowned expert in medical oncology and urologic cancer. A clinical professor of medicine at Harvard Medical School, he also maintains an active clinical practice at Beth Israel Deaconess Medical … See Full Bio View all posts by Marc B. Garnick, MD

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January 15, 2024 dirvel

What? Another medical form to fill out?

A patient information form positioned diagonally with a stethoscope with light blue tubing coiled on top

You’re in a doctor’s office with a clipboard and a pile of medical forms on your lap. For the umpteenth time, you must now jot down your medical history — conditions, ongoing symptoms, past procedures, current medications, and even the health of family members.

But how much information should you include? Which details are most important? And why are you slogging through paper forms when a digital version likely exists? Put down your pen for a moment and take a breath. We have some answers.

Do you actually need to fill out the forms again?

In many cases, you do need to fill out medical history forms. That can be true even if you already have a digital record on file, known as an electronic medical record (EMR) or electronic health record (EHR).

The reason for collecting new information could be due to a variety of reasons:

  • The health care provider might want an update, since information like medications or new health problems can change over time, or you might have missing or inaccurate information in your record.
  • Different specialists need to know about different aspects of your health.
  • Your EMR at one provider’s office might not be accessible to others because practices don’t always have compatible computer software.
  • Some practices don’t want to rely on records created by other practices. They may not trust that they’re accurate.

What if you don’t want to fill out the forms?

“You don’t have to,” says Dr. Robert Shmerling, a rheumatologist and senior faculty editor at Harvard Health Publishing. “But the response from the practice might be, ‘How can we provide the best care if you don't provide the information?’ And if you persist, you run the risk of marking yourself — unfairly, perhaps — as uncooperative.”

What are the most important details in your medical history?

The most important details of your medical history include

  • chronic or new symptoms and conditions
  • past surgeries
  • family medical history
  • insurance information
  • current prescription and over-the counter medicines, supplements, vitamins, and any herbal remedies or complementary medicines you use
  • medication allergies
  • vaccination history
  • any screening tests you’ve had, so they won’t be prescribed unnecessarily
  • any metal implants you have, which could affect screenings.

If you don’t know all of the details, try to get them from a previous doctor or hospital you’ve visited.

“In some cases, not having the information could be a problem. For example, I need to know if my patients have had certain vaccines or if they have medication allergies,” says Dr. Suzanne Salamon, associate chief of gerontology at Harvard-affiliated Beth Israel Deaconess Medical Center.

Which information might be less important?

Sometimes, leaving out certain details might not matter, depending on the purpose of your health visit. For example, your eye doctor doesn’t need to know that you broke your wrist when you were 18, had the flu last year, or had three C-sections. But they should know which medicines and supplements you take, and whether you have certain health conditions such as diabetes or high blood pressure.

Not sure what to leave in or out of your history? Dr. Salamon suggests that you at least focus on the big stuff: chronic symptoms and conditions that need ongoing treatment, medications and supplements you’re taking, and your family medical history.

“If you can, bring a copy of your medical history to all new doctor appointments. It could be written or printed from your patient portal or kept handy on a digital health app. That way, you’ll have it handy if you need to fill out medical forms or if the physician asks you questions about your medical history during an appointment,” Dr. Salamon advises.

How secure is the information you’re providing?

We trust health care professionals with our lives and our most private information, including our social security numbers (SSNs). SSNs are used to double-check your identity to avoid medical errors, and to make sure your insurance information is accurate and practices get paid.

Is it really safe to hand over the information? It’s supposed to be. A federal law called the Health Insurance Portability and Accountability Act (HIPAA) protects your health information with very strict rules about who can access it and how it can be shared.

“Medical practices take this very seriously,” Dr. Shmerling says. “They have lots of safeguards around personal health information, and routinely warn medical staff about not looking at or sharing information inappropriately — with the threat of being fired immediately if they do. Electronic health records usually track those who look at our information, so it's often not hard to enforce this.”

But no hospital or other entity can guarantee that your information is protected. That’s true of all information, especially with the constant threat of cyberattacks.

“So if you feel strongly about it, you can try saying that you’d rather not provide certain information and ask whether the practice can explain why it’s necessary,” Dr. Shmerling says. “It takes a certain amount of trust in the system that personal health information will be kept private, even though that may feel like taking a leap of faith.”

About the Author

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Heidi Godman, Executive Editor, Harvard Health Letter

Heidi Godman is the executive editor of the Harvard Health Letter. Before coming to the Health Letter, she was an award-winning television news anchor and medical reporter for 25 years. Heidi was named a journalism fellow … See Full Bio View all posts by Heidi Godman

About the Reviewer

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Howard E. LeWine, MD, Chief Medical Editor, Harvard Health Publishing

Dr. Howard LeWine is a practicing internist at Brigham and Women’s Hospital in Boston, Chief Medical Editor at Harvard Health Publishing, and editor in chief of Harvard Men’s Health Watch. See Full Bio View all posts by Howard E. LeWine, MD

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January 1, 2024 dirvel

Have you exfoliated lately?

Exfoliation products arranged diagonally on a cream-colored background: brushes, pumice stones, rough-knit mitt, serums, lotions & more

Social media has a way of making the ho-hum seem fresh and novel. Case in point: exfoliation, the process of removing dead cells from the skin’s outer layer. Anyone scrolling through TikTok lately might be convinced this longtime skin care approach can transform something old — let’s say our aging epidermis — into like-new skin.

But a Harvard dermatologist says that’s asking too much.

“I don’t think exfoliation is going to fix anybody’s wrinkles,” says Rachel Reynolds, MD, interim chair of dermatology at Harvard-affiliated Beth Israel Deaconess Medical Center. While exfoliation offers definite benefits, it can also irritate and inflame the skin if you don’t do it carefully, or use tools or chemicals your skin doesn’t tolerate.

How is exfoliation done?

There are two main ways to exfoliate: mechanical and chemical. Each boasts specific advantages.

  • Mechanical (or physical) exfoliation uses a tool such as a brush or loofah sponge, or a scrub containing abrasive particles, to physically remove dead skin cells. “Mechanical exfoliation can improve skin luster by taking off a dead layer of skin that can make it look dull,” Dr. Reynolds says. “And it can help unclog pores a bit, which can reduce some types of acne.”
  • Chemical exfoliation uses chemicals — often alpha and beta hydroxy acids or salicylic acid — to liquify dead skin cells. “Chemical exfoliants work on a more micro-level to help dissolve excess skin cells and reduce uneven pigmentation sitting at the surface of the skin,” she explains. “They also restore skin glow, improve acne, and give the skin a little more shine.”

Why do skin care products so often promote exfoliation?

Perhaps hundreds of commercially available skin care products — from body washes to cleansers to face masks — are labeled as exfoliating, Dr. Reynolds notes. But she’s skeptical about why such a wide array of items plug this feature so prominently.

“It’s advantageous for a cosmetics company to sell consumers more products in a skin care line,” she says. “But it’s buyer beware, because this is a completely unregulated market, and cosmetic companies can make claims that don’t have to be substantiated in actual clinical trials.”

Do we need to exfoliate our skin?

No. “Nothing happens if you don’t exfoliate — you just walk around with bumpy or slightly dry skin, which is inconsequential except for cosmetic reasons,” Dr. Reynolds says.

“No one has to exfoliate, but it can be helpful to exfoliate the arms and legs,” she adds. “As we age, these areas get more dry than other parts of the body, and people notice they build up a lot more flaking skin and an almost fish-scale appearance.”

That phenomenon may or may not be a sign of keratosis pilaris, a common but harmless skin condition characterized by rough, bumpy “chicken skin” on the upper arms and thighs. Physical exfoliators are a good first choice because keratosis pilaris covers areas that have tougher skin than the face, she says. But it’s fine to use a cleanser or lotion containing a chemical exfoliant instead. Either type can improve skin texture and the skin’s appearance.

Can exfoliation harm our skin?

Yes. Both physical and chemical exfoliation techniques can do more harm than good, depending on several factors. Sensitive skin is more likely to become irritated or inflamed by any exfoliant. And overdoing it — whether by rubbing too hard or using a product with higher concentrations of acid — can trigger irritant contact dermatitis, which can look red, angry, and chapped.

“Physical exfoliation that’s done too harshly can also aggravate inflammatory acne, making it worse,” Dr. Reynolds says. “Also, exfoliating can make you more prone to sunburn.”

What are the safest ways to exfoliate?

Dr. Reynolds recommends chemical exfoliants over physical versions. “Sometimes the abrasives in those apricot scrubs, for example, can go too far, aggravating the skin and creating inflammation,” she says.

She offers these additional tips to exfoliate safely:

  • If you haven’t exfoliated before, start with a simple washcloth to determine how well your skin responds to mild attempts at physical exfoliation.
  • Then try gentler chemical exfoliants, such as lower concentrations of hydroxy acids or salicylic acid. Work your way up to stronger concentrations only if needed.
  • If you’re hoping to eradicate stubborn skin problems such as melasma (brown facial patches) or comedonal acne (small, skin-colored bumps often on the forehead or chin), consider undergoing a chemical peel at a dermatologist’s office.

Don’t exfoliate every day. “At most, do it two or three times a week,” Dr. Reynolds says. “Your skin needs to repair itself in between exfoliation episodes.”

About the Author

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Maureen Salamon, Executive Editor, Harvard Women's Health Watch

Maureen Salamon is executive editor of Harvard Women’s Health Watch. She began her career as a newspaper reporter and later covered health and medicine for a wide variety of websites, magazines, and hospitals. Her work has … See Full Bio View all posts by Maureen Salamon

About the Reviewer

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Howard E. LeWine, MD, Chief Medical Editor, Harvard Health Publishing

Dr. Howard LeWine is a practicing internist at Brigham and Women’s Hospital in Boston, Chief Medical Editor at Harvard Health Publishing, and editor in chief of Harvard Men’s Health Watch. See Full Bio View all posts by Howard E. LeWine, MD

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December 22, 2023 dirvel

How healthy is sugar alcohol?

A blue background sprinkled with white sugar substitute crystals with the words sugar free written; concept is sugar alcohols and artficial sweeteners

If you are trying to cut back on added sugar — and you should, because excess sugar increases risks for obesity, diabetes, and heart disease — you might be tempted by products advertised as low sugar, no sugar, or sugar-free.

Many contain familiar low-calorie sugar substitutes like aspartame or sucralose instead of sugar. And as you’re reading labels, you also may run across another ingredient: sugar alcohol, which is used in products like sugar-free cookies, candies, ice cream, beverages, and chewing gums. Are any of these sweeteners a better choice nutritionally? Dr. Frank Hu, professor of nutrition and epidemiology with the Harvard T.H. Chan School of Public Health, weighs in below.

Are low-calorie or no-calorie sweeteners any healthier than natural sugar?

Also known as artificial sweeteners or sugar substitutes, the list of low-calorie and no-calorie sweeteners you may see on product nutrition labels includes acesulfame-K, saccharin, sucralose, neotame, and advantame. These have a higher sweetness intensity per gram than natural sugar.

So far research on them is mixed, although some observational studies have found that beverages containing low-calorie sweeteners are associated with a higher risk for diabetes and weight gain.

What exactly are sugar alcohols and how can you spot them?

Sugar alcohols may have the most misleading name, as they are neither sugar nor alcohol, according to Dr. Hu. “They are a type of carbohydrate derived from fruits and vegetables, although most commercial sugar alcohols are synthetically produced.”

You can usually spot many sugar alcohols on ingredient lists by “-ol” at the ends of their names. Examples include sorbitol, xylitol, lactitol, mannitol, erythritol, and maltitol.

Are sugar alcohols any healthier than other sugar substitutes or natural sugar?

Here is a look at the pros and cons.

The upside of sugar alcohols

Sugar alcohols reside in the sweet spot between natural sugar and low-calorie sweeteners. They are not as overly sweet as sweeteners and don’t add too many extra calories like sugar.

“Sugar alcohols are about 40% to 80% as sweet as natural sugar, whereas artificial sweeteners like aspartame are about 200 times sweeter,” says Dr. Hu. “And they have about 25% to 75% fewer calories per gram than sugar.”

Another upside of sugar alcohols is that they break down slowly in the gut. Hence, your body only absorbs part of their overall carbohydrates. “This keeps your blood sugar and insulin levels from spiking as they do with sugar,” says Dr. Hu. “That makes them a useful sugar substitute for people with diabetes.”

The downside of sugar alcohols

The main downside to sugar alcohols is this: when taken in high amounts they can cause gastrointestinal (GI) problems, such as abdominal pain, diarrhea, or loose stools.

Because sugar alcohols are slowly digested, they have more time to feed bacteria in the gut, which can lead to fermentation and produce excess gas. Their slow digestion also can pull extra water into the colon and cause a laxative effect.

People’s tolerance for sugar alcohols depends on many factors, including body weight, health conditions, and the amount and types of sugar alcohols. “Individual differences in digestion and metabolism, gut microbiome composition, and dietary habits can also make a difference,” says Dr. Hu. “For these reasons, we recommend introducing sugar alcohols into your diet gradually and observing how your body responds.”

For people who experience GI symptoms caused by sugar alcohols, Dr. Hu says cutting back on the amount of foods and drinks made with them often can correct the problem. “Sugar alcohols are commonly found in sugar-free or low-carb products, so pay attention to food labels” he says. “Because different sugar alcohols can have different effects, it might be useful to identify specific types of sugar alcohols that cause GI side effects.”

Do sugar alcohols have health risks?

Possible long-term health risks of sugar alcohol are still being explored. A 2023 observational study found a link between using erythritol as an added sweetener and cardiovascular disease events, such as stroke and heart attack, in people with heart disease or who had risk factors like diabetes and high blood pressure. However, these findings have not been confirmed in subsequent studies.

“Sugar alcohols offer a healthier alternative to sugar because of their lower calorie content and reduced glycemic response, which is the effect food has on blood sugar levels,” says Dr. Hu. “But they also have potential drawbacks, especially for those with sensitive digestive systems, so it’s best to consume them in moderation as part of an overall healthy eating pattern.”

About the Author

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Matthew Solan, Executive Editor, Harvard Men's Health Watch

Matthew Solan is the executive editor of Harvard Men’s Health Watch. He previously served as executive editor for UCLA Health’s Healthy Years and as a contributor to Duke Medicine’s Health News and Weill Cornell Medical College’s … See Full Bio View all posts by Matthew Solan

About the Reviewer

photo of Howard E. LeWine, MD

Howard E. LeWine, MD, Chief Medical Editor, Harvard Health Publishing

Dr. Howard LeWine is a practicing internist at Brigham and Women’s Hospital in Boston, Chief Medical Editor at Harvard Health Publishing, and editor in chief of Harvard Men’s Health Watch. See Full Bio View all posts by Howard E. LeWine, MD

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