Fitness basics
Learning Center
When cancer returns: How to cope with cancer recurrence
Learn what cancer recurrence means, and find out what you can do to cope when cancer returns.
Fitness program: 5 steps to get started
Starting a fitness program is easier than you might think. Follow these five steps.
Teens and social media use: What's the impact?
Find out how to help limit the negative impact of these popular apps on your teenager.
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.
Post-traumatic stress: How can you help your loved one?
Use these tips to help someone cope with stress from a traumatic event, whether it's acute stress disorder (ASD) or post-traumatic stress disorder (PTSD).
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.
Priapism
Understand the symptoms, possible causes and treatment of prolonged erection of the penis, including when to seek emergency care.
Stress fractures
Stress fractures are tiny cracks in bones often caused by overuse or osteoporosis. Learn how to prevent and treat them.
Male hypogonadism
This condition affects the ability of men's bodies to produce enough testosterone or enough sperm or both.
Retrograde ejaculation
Learn about the symptoms and treatment options for this condition that can cause male infertility.
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