Aerobic exercise
Learning Center
10,000 steps a day: Too low? Too high?
Work up to a goal of walking 10,000 steps each day, depending on your starting fitness level, for numerous health benefits.
5K run: 7-week training schedule for beginners
Running a 5K? Make it to race day in seven weeks.
Aerobic exercise: How to warm up and cool down
Learn how to warm up and cool down the safe way.
Aerobic exercise: Top 10 reasons to get physical
Need inspiration to work out? Consider the top 10 benefits of aerobic exercise.
Aquatic exercises
Thinking about signing up for an aquatic exercise class? Or trying water exercises on your own? Check out these pool moves.
Brain AVM (arteriovenous malformation)
Tangled blood vessels in the brain affect typical blood flow in this rare condition. Learn more.
Exercise intensity: How to measure it
To get the most out of exercising, aim for moderate to vigorous exercise intensity. See how to judge your exercise intensity.
Exercise: How much do I need every day?
Find out how much exercise you need and how to get it.
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.
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