Core exercises
Learning Center
Video: Abdominal crunch with fitness ball
You can do many core exercises with a fitness ball. See the abdominal crunch.
Video: Bridge with fitness ball
You can do many core exercises with a fitness ball. See the bridge.
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: Endoscopy
An endoscopy allows your doctor to view your esophagus, stomach and part of the small intestine. Here's how it works.
Video: Barium enema
See what to expect during an X-ray examination of your colon.
MRI: Is gadolinium safe for people with kidney problems?
Older gadolinium contrast agents used with MRI posed a risk for people with severe kidney failure. Newer versions are much safer.
Cholesterol test kits: Are they accurate?
Home cholesterol test kits are often as accurate as the test a health care professional uses, but the quality of results can depend on how well you follow the directions for the test.
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