MUSCLES ENGAGED Chest Strengthening the chest muscles will help you push things easily and effortlessly. The muscles in your chest help stabilize your shoulder joint, which reduces your vulnerability shoulder joint injuries. Working your chest muscles also has an aesthetic factor (body contouring). Quadriceps The quadriceps (quads) are a group of four muscles on the front of the thigh. They allow your knee to straighten and provide stability when standing. Your quads are the most important muscle group for maintaining the ability to stand and to walk independently. Exercise Instructions Step 1 Stand on one foot with your hands by your side. Step 2 Place your hands on the ground and walk out in to a push-up position. Make sure to keep your back flat and your core engaged. Step 3 Perform a push-up at the bottom then walk yourself back up to the starting position staying on the single leg the entire time.