Stretching and flexibility
Learning Center
Stretching: Focus on flexibility
Learn why stretching your muscles is an important part of your exercise routine and how to do it safely.
A guide to basic stretches
Find ways to stretch safely with this guide.
Golf stretches for a more fluid swing
Golf stretches help promote a more fluid golf swing. And that could boost your game.
Keratoconus
When your cornea bulges outward, it can cause blurry vision and make your eyes sensitive to light. Find out about symptoms, causes and treatment for this eye condition.
Narcolepsy
Learn more about this sleep disorder that causes periods of involuntary sleep, sleep paralysis and early rapid eye movement (REM) sleep.
Brain AVM (arteriovenous malformation)
Tangled blood vessels in the brain affect typical blood flow in this rare condition. Learn more.
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.