Search results
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What's a Strain? for Kids
A strain happens when a muscle gets stretched too far.
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Pompe Disease for Parents
Pompe disease is a rare genetic condition that makes muscles get weaker over time.
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Your Muscles for Kids
You have more than 600 muscles in your body! They do everything from pumping blood throughout your body to helping you lifting your heavy backpack. Find out more.
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Hamstring Strain for Teens
A hamstring strain happens when one or more of the muscles in the back of the leg gets stretched too far and starts to tear. Find out how to treat hamstring strains in this article for teens.
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Myasthenia Gravis for Parents
Myasthenia gravis (or myasthenia) happens when voluntary muscles get weaker. Treatments can help symptoms.
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Why Exercise Is Wise for Teens
Getting the right amount of exercise can rev up your energy levels and even help you to feel better emotionally. Find out why.
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What Causes Muscle Twitches? for Teens
Find out what the experts have to say.
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Groin Strain for Teens
A groin strain is when one or more of the muscles in the inner thigh gets stretched, injured, or torn. Find out what to do for groin strains.
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Juvenile Dermatomyositis for Parents
Juvenile dermatomyositis (JDM) is an autoimmune disease that makes muscles, skin, and sometimes other organs become inflamed or damaged.
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Becker Muscular Dystrophy for Parents
Becker muscular dystrophy is a genetic disorder that gradually makes the body's muscles weaker and smaller. It causes less severe problems than the most common type of MD, Duchenne muscular dystrophy.