Notonly can working out abs every day lead to postural problems, but also muscle imbalances. Your abs complex, which is all your abs muscles are comprised of the rectus abdominus, transverse abdominus, internal obliques, and external obliques. If you do standard crunches 7 days a week for 300 reps, your rectus abdominus muscle (the six Getripped, 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 workouts plus warm-ups and cooldowns. Inunder six weeks, I’ve lost 8.2cm from my waist, with my final measurement coming in at 74.2cm. My body fat percentage has dropped from 31.2 to 26.5, a reduction of 4.7 per cent and – despite the muscle gain – I have lost a little weight: 1.6kg to be precise. Physical benefits aside though, my six weeks of training with Rich have 2Lg42F.