7 Weeks to 300 Sit-Ups: Strengthen and Sculpt Your Abs, Back, Core

7 Weeks to 300 Sit-Ups: Strengthen and Sculpt Your Abs, Back, Core

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7 Weeks to 300 Sit-Ups: Strengthen and Sculpt Your Abs, Back, Core and Obliques by Training to Do 300 Consecutive Sit-Ups

Forget sit-ups — it only takes 7 exercises and 20 minutes to

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