Body weight exercises
Learning Center
Video: Step-up exercise
The step-up is an exercise for the legs and buttocks. See how it's done.
Video: Squat exercise
The squat is an exercise that targets the leg muscles. See how it's done.
Video: Modified pushup
The modified pushup is less challenging than a classic pushup. See how it's done.
Video: Lunge exercise
The lunge is an exercise that targets the leg muscles. See how it's done.
Video: Abdominal crunch
The abdominal crunch is a classic core-strength exercise. See how it's done.
Trichotillomania (hair-pulling disorder)
In this mental health condition, people can't resist urges to pull out hair from their body. They do this often. Therapy may help reduce or stop urges.
Stress fractures
Stress fractures are tiny cracks in bones often caused by overuse or osteoporosis. Learn how to prevent and treat them.
Puberty blockers for transgender and gender-diverse youth
Understand how puberty blockers work to suppress puberty. Learn about their benefits, side effects and long-term effects.
Pericarditis
Inflammation of the tissue surrounding the heart can cause sharp chest pain and other symptoms. Know how pericarditis is diagnosed and treated.
Narcolepsy
Learn more about this sleep disorder that causes periods of involuntary sleep, sleep paralysis and early rapid eye movement (REM) sleep.
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