5-Minute Flat Belly Ab Workout

5-Minute Flat Belly Ab Workout. Do you want a flat belly and sexy, strong core? If you're looking to flatten your stomach this workout is for you. It's time to give up crunches and do some ab work that really works. This five-minute workout of standing ab exercises targets your core to give you a sleek and strong midsection. It's time to reshape your stomach!