Core exercises
Learning Center
Video: Plank with fitness ball
You can do many core exercises with a fitness ball. See the plank.
Video: Abdominal ball raise with fitness ball
You can do many exercises with a fitness ball. See the abdominal ball raise.
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: Rotator cuff damage
See how your rotator cuff can become damaged.
Slide show: How your brain works
Which part of your brain does what? Take a tour with this slide show.
Clinical depression: What does that mean?
The term "clinical depression" means severe, persistent depression. It's also called major depression or major depressive disorder.
Reactive hypoglycemia: What can I do?
Reactive hypoglycemia is low blood sugar that happens after eating.
Cigar smoking: Safer than cigarette smoking?
Despite what you might think, cigars aren't that different from cigarettes. Like cigarettes, cigars contain nicotine, tobacco and cancer-causing chemicals.
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.
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