Crunches vs Sit Ups: which one is best and how to do it

Sit-Ups vs. Crunches: Which Ab Exercise Is Best?

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Crunches vs sit ups: what's the difference - and what's best for

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How to Do the Sit-Up

How to Do Crunches

How To Do Side Crunches

Are Sit-Ups or Crunches Better? - SET FOR SET

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How to Do Abdominal Crunches or Sit-Ups on an Exercise Ball

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