Super fast at home abs workout to flatten and tighten your stomach for a sexy look ! Start now , then we must kill bad fat. This core strength exercise targets your obliques – the muscles on the side of your waist responsible for the "V" cut above your hips and tightening your waist and tummy. To get the best results from this awesome ab core strength exercise! Work up to 15 – 20 repetitions on each side and do 5 set of 20 – 25 of crunches. Suggested tags: +One Week