“Model Workout” S:1 E:3 Arms, Back and Tummy

S:1 E:3 Arms, Back and Tummy The second part of this exercise concentrates on getting sexy arms, nice toned back, and tightening and firming that tummy. As you work your upper body and pectoral muscles, your chest gets firmer. This workout tones up your muscles, giving it the support and lift that it needs.