Aerobic exercise
Learning Center
Bruxism (teeth grinding)
Bruxism is a condition in which you grind, gnash or clench your teeth unconsciously when you're awake or while you're sleeping.
Latex allergy
This allergy is a reaction to proteins in natural rubber latex — found in medical gloves, balloons and more. Find out how to avoid many common triggers.
Aerobic exercise: How to warm up and cool down
Learn how to warm up and cool down the safe way.
Aging: What to expect
Understand the natural changes that come with aging.
Alzheimer's genes: Are you at risk?
What role do genes play in developing Alzheimer's? Are you at risk?
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.
Smokeless tobacco products
Learn the risks of using products such as chewing tobacco, snuff and snus.
Walking: Make it count with activity trackers
If walking is your main form of physical activity, see how activity trackers can help you set and achieve your fitness goals.
Stress symptoms: Effects on your body and behavior
Learn how stress symptoms can affect your health so that you can take action.
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.
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