This exercise packs a punch, even if you don’t use any weight! In addition to the flatter, slimmer waistline SummerABS stands for, it will also focus on your stamina, and build it. Proper and deep, focused breathing will be very helpful throughout this exercise. Maintain a keen eye on the abdominal scoop, and we’re in business! The SummerABS Stretch Back is a great precursor to the Medicine Ball M's.