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  • Lie on your back with your knees bent.
  • "Brace" your stomach—tighten your muscles by pulling in and imagining your belly button moving toward your spine. You should feel like your back is pressing to the floor and your hips and pelvis are rocking back.
  • Hold for about 6 seconds while breathing smoothly.
  • Repeat 8 to 12 times.
By Healthwise Staff See additional information
Primary Medical Reviewer William H. Blahd, Jr., MD, FACEP - Emergency Medicine
Specialist Medical Reviewer Joan Rigg, PT, OCS - Physical Therapy
Current as of March 12, 2014

WebMD Medical Reference from Healthwise

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Heart Rate Calculator

Ensure you're exercising hard enough to get a good workout, but not strain your heart.

While you are exercising, you should count between...

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PER
Seconds