Instructions
Place one foot in the middle of the powerband with the other foot back behind you.
Using the same side as the foot on the band, Grasp the the loose end of the band, the lower down the band you go, the greater the band tension will be.
Bring your elbow up to your side, and keep your upper arm close to your body. From here straighten your elbow until your arm is back behind you.
Return to the start position and repeat. Then repeat on the other side.