Diet and exercise
Learning Center
Weight loss: Better to cut calories or exercise more?
Understand how calorie restriction and exercise help you meet weight goals.
Walking: Is it enough for weight loss?
Walking and a prudent diet can put you on the path to sustainable weight management.
Exercise for weight loss: Calories burned in 1 hour
Trying to lose weight or at least not gain more? Find out how many calories are burned by an hour walking, swimming or using the elliptical.
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.
Brain AVM (arteriovenous malformation)
Tangled blood vessels in the brain affect typical blood flow in this rare condition. Learn more.
Narcolepsy
Learn more about this sleep disorder that causes periods of involuntary sleep, sleep paralysis and early rapid eye movement (REM) sleep.
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.