3. Back/shoulders: Power band chin-up
Place band around chin-up bar; the thicker the band, the easier it is. Stand on a step and place hands on bar facing forwards using a wide grip. Place one knee into the band. With tight core and shoulder blades back and down, pull chin up to bar height and then slowly lower back down.

Why it works: This is a big muscle group exercise that will help add muscle and width across back and shoulders.