Find Information About:

Drugs & Supplements

Get information and reviews on prescription drugs, over-the-counter medications, vitamins, and supplements. Search by name or medical condition.

Pill Identifier

Pill Identifier

Having trouble identifying your pills?

Enter the shape, color, or imprint of your prescription or OTC drug. Our pill identification tool will display pictures that you can compare to your pill.

Get Started
My Medicine

My Medicine

Save your medicine, check interactions, sign up for FDA alerts, create family profiles and more.

Get Started

WebMD Health Experts and Community

Talk to health experts and other people like you in WebMD's Communities. It's a safe forum where you can create or participate in support groups and discussions about health topics that interest you.

  • Second Opinion

    Second Opinion

    Read expert perspectives on popular health topics.

  • Community


    Connect with people like you, and get expert guidance on living a healthy life.

Got a health question? Get answers provided by leading organizations, doctors, and experts.

Get Answers

Sign up to receive WebMD's award-winning content delivered to your inbox.

Sign Up

Children's Health

Font Size

Kids Worldwide Getting Less Heart Fit: Study

Large study of running fitness in recent decades found today's children are much slower


Tomkinson said there are many factors that have combined to create an increasingly inactive society, including the following:

  • Communities designed to discourage walking, bicycling and backyard play. "We have to travel farther to get to parks and green spaces, and they may not always be of the best quality," he said. "Kids are less likely to ride bikes or walk to school."
  • Schools that have either rid themselves of physical education or replaced it with a less strenuous version of the class. These days, only 4 percent of elementary schools, 8 percent of middle schools and 2 percent of high schools offer a daily physical education class, Kass said.
  • The prevalence of TV, computer, tablet and smartphone screens that sap a kid's will to venture outdoors.

Obesity also plays a part. "We are fatter today, so from a weight-bearing perspective it's harder to move our bodies through space," Tomkinson said, noting that about 30 percent to 60 percent of declines in endurance running performance can be explained by increases in body fat mass.

So what's the solution? To Tomkinson, it's simple -- kids need to be exposed to prolonged exercise that leaves them exhausted.

"You want exercise to be fun, but there needs to be some huff and puff there as well," he said. "It needs to make them somewhat tired."

Kids need to engage in at least 60 minutes of physical activity that uses the body's big muscles, like running, swimming or cycling, Tomkinson said.

It doesn't have to be all at once, however. Tomkinson said kids can "snack" on physical activity throughout their day -- engaging in a walk for 10 minutes in the morning, or playing an active game for 10 minutes at recess, for example.

Parents also need to engage with their kids, he added. They should limit a kid's sedentary time to no more than two hours a day, while also exposing them to a range of physical activities they might enjoy.

Kass of Let's Move! called on Americans to work toward making physical activity easier and more fun, both for children and adults.

"We know we need to break this cycle of passing physical inactivity down from one generation to the next," Kass said. "There's no one solution. It's got to happen in a comprehensive way. We have to integrate physical activity in our lives. It's got to be a part of our daily lives."

1 | 2

Today on WebMD

child with red rash on cheeks
What’s that rash?
plate of fruit and veggies
How healthy is your child’s diet?
smiling baby
Treating diarrhea, fever and more.
Middle school band practice
Understanding your child’s changing body.

worried kid
jennifer aniston
Measles virus
sick child

Child with adhd
rl with friends
Syringes and graph illustration