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

  • Author(s): Stewart, Brett
  • Publisher: Ulysses Press
  • Print ISBN: 9781612430492, 161243049X
  • eText ISBN: 9781612430737, 1612430732

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