Aerobic exercise
Learning Center
Walking: Trim your waistline, improve your health
Walking can be an ideal low-impact exercise. Get the most from your walking routine.
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.
Twin pregnancy: What twins or multiples mean for mom
Twin pregnancy or other multiples? Here's help taking care of yourself — and your babies.
Testosterone therapy: Potential benefits and risks as you age
Testosterone therapy — Explore the potential benefits and risks of increasing your testosterone level.
Teen suicide: What parents need to know
Understand what makes teens prone to suicide, and learn what you can do to prevent it.
Stress symptoms: Effects on your body and behavior
Learn how stress symptoms can affect your health so that you can take action.
Smokeless tobacco products
Learn the risks of using products such as chewing tobacco, snuff and snus.
Sex education: Talking to your teen about sex
Sex education is a parent's job. Here's help handling the challenge.
Senior sex: Tips for older men
Sex isn't just for the young. Get tips for staying active, creative and satisfied as you age.
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.
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