Fitness basics
Learning Center
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.
Erectile dysfunction: Nonoral treatments
Get the facts about shots, penis pumps and other ED treatments that don't involve taking medicine by mouth.
How fit are you? See how you measure up
Find your fitness level with these simple fitness tests.
Diabetes treatment: Can cinnamon lower blood sugar?
Learn what cinnamon's role may be as part of a diabetes treatment plan.
Fitness training: Elements of a well-rounded routine
Is your fitness training program complete? Here's help to make sure you have all the basics in your program.
Rett syndrome
This rare genetic disorder affects the way the brain develops, causing a progressive inability to use muscles for eye and body movements and language.
Spermatocele
Learn more about this noncancerous testicular disorder that may require surgery if it's causing discomfort. But, the condition often needs no treatment.
Testicular torsion
Sudden, severe pain in the scrotum could be testicular torsion. Learn about symptoms and treatment for this health emergency.
Kratom for opioid withdrawal: Does it work?
Kratom is promoted as an aid in overcoming withdrawal from opioid medications, but research suggests that it leads to more health problems than it solves.
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