Core exercises
Learning Center
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.
X-linked agammaglobulinemia
This genetic disease weakens the immune system, mainly in males, and leads to having infections often.
Wolff-Parkinson-White (WPW) syndrome
This heart condition present at birth causes a fast heartbeat. Rarely, it can cause sudden cardiac death. Know the symptoms and how it's treated.
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.
Whooping cough
Learn more about the symptoms, causes, treatment of this highly contagious, vaccine-preventable lung infection.
Video: Squat and reach with fitness ball
You can do many exercises with a fitness ball. See the squat and reach.
Video: Side exercise with fitness ball
You can do many core exercises with a fitness ball. See a side exercise.
Video: Reverse crunch with fitness ball
You can do many core exercises with a fitness ball. See the reverse crunch.
Video: Plank with fitness ball
You can do many core exercises with a fitness ball. See the plank.
Video: How to choose a fitness ball
A fitness ball is versatile, but it's not one-size-fits-all. See your options.
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