Aqua Power Crunch With Marti Peters Put some power into your abs workout! Make each crunch count by positioning the body properly and using equipment to add resistance. To access this content, you must purchase Aqua Power Crunch, OnDemand Monthly Subscription Payment Plan, OnDemand Annual Subscription, OnDemand Monthly Subscription, OnDemand 6-Month Subscription or OnDemand 2 Year Subscription or log in if you are a member.