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 and Obliques by Training to Do 300 Consecutive Sit-Ups by Stewart, Brett - ISBN 10: 161243049X - ISBN 13: 9781612430492 - Ulysses Press - 2012 - Softcover

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

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2014 spring brashier_core is key

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