VIDEO | by PopSugar Fitness

How to Do Crunches Correctly

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VIDEO DESCRIPTION:
The crunch is a classic abdominal exercise, but while you're toning your abs, you might be crunching your spine. Learn how ...
to correct your form to work your abs more effectively while protecting your back.
Posted: 08/08/2012 | Views: 317,445 | Duration: 01:53
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