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The Fastest Way to Improve Your Sit-Ups

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How to improve your sit-ups starts by first perfecting your form. Then, weave sit-ups into a total core-strengthening routine to develop more endurance.

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Tips to improve your sit-ups, by TSgt. Tim Kelly

How to Do the Sit-Up

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4 Ways to Do Sit Ups - wikiHow

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How to Do the Sit-Up

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BUILD A 6-PACK, 3 TIPS FOR BETTER SIT-UPS