Sports nutrition
Learning Center
Which CPAP masks are best for you?
CPAP masks come in a variety of styles. See some of your options.
White stool: Should I be concerned?
White stool may mean a serious liver problem. Learn about causes.
Why interval training may be the best workout at any age
High-intensity interval training (HIIT) may provide more benefits for older exercisers than the young and fit. Learn how to harness the power of intervals whatever your age.
Withdrawal method (coitus interruptus)
The withdrawal method — pulling the penis out of the vagina before ejaculation — isn't the most effective birth control. Learn about the pros and cons.
Working out? Time your meals right
Think about how much you eat before you work out. If you eat too much, you may feel sluggish. On the flip side, if you don't eat much before you exercise, you may not have the energy to keep feeling strong throughout your workout. To strike the right balance, eat a light snack before exercising. After a big meal, wait a few hours before hitting the gym.
Wrinkles
These lines in the skin are a natural part of aging that's also affected by sun exposure and smoking. Learn about prevention tips and treatment options.
Wrist blood pressure monitors: Are they accurate?
Devices that measure blood pressure at the wrist may be an option for some people. Know how to position a wrist monitor properly.
Yeast infection in men: How can I tell if I have one?
Yeast infections can occur in men, causing inflammation of the penis (balanitis). Learn what signs and symptoms could mean you have a yeast infection.
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