Start with a dynamic total-body warm-up, then begin to shed fat and build lean core muscles with two complete circuits of cardio-charged core exercises and on-the-floor moves that target every angle of your abs. Finish with a full-body stretch.

Rev up your metabolism with calorie-burning warm-up, then kick this complete ab workout into high gear with more explosive core moves to intensify fat burn and sculpt lean muscle. Finally, reward your body with an essential cooldown.

Get ripped, flat abs in 6 weeks with America's toughest trainer, Jillian Michaels. Forget boring sit-ups - Jillian's ab-shredding system will chisel the midsection with her winning combination of core-focused cardio circuits and ab-toning exercises. 6 WEEK SIX-PACK includes two dynamic 30-minute ...