Fitness basics
Learning Center
Heart rate: What's normal?
A normal resting heart rate for adults ranges from 60 to 100 beats per minute. A heart rate above or below that may signal a problem.
How fit are you? See how you measure up
Find your fitness level with these simple fitness tests.
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.
Mayo Clinic Minute: How to hit your target heart rate
Learn how to exercise at your target heart rate.
Mayo Clinic Minute: Why concussion screening is important
Concussion screening can help determine when athletes can return to play.
Narcolepsy
Learn more about this sleep disorder that causes periods of involuntary sleep, sleep paralysis and early rapid eye movement (REM) sleep.
Pericarditis
Inflammation of the tissue surrounding the heart can cause sharp chest pain and other symptoms. Know how pericarditis is diagnosed and treated.
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.
Stress fractures
Stress fractures are tiny cracks in bones often caused by overuse or osteoporosis. Learn how to prevent and treat them.
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.
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