It's no secret that well-defined abs are the hallmark of fitness, a chance to show off your hard work in training and proper nutrition. To help you get your midsection ready for action, we are hosting an April Ab Challenge for enduraLAB members. To complete the challenge, all you need to do is show up to class and complete the ab work at the end of each workout. Before you leave, remember to record your efforts by putting a sticker next to your name on the Ab Challenge chart. We'll sweeten the deal by awarding the top male and female participants with an awesome enduraLAB tee.