First, securely attach a band to something that won’t move or break. Be sure to attach it at waist height.
You should position yourself perpendicular from the anchor point and grab the band in the hand closest to the anchor. Bring the your elbow in a bent position to the side and your hand point away from the anchor. Make sure you are far enough away that there is no slack in this position.
This is the starting position.
From here press the band across your body and diagonally up as far as you can. After this, slowly return the arm back to the starting position. This is one repetition, now repeat this for the desired amount. Once you’ve done all the reps on one arm, if required in the program and you are able to do so, repeat the exercise and the repetitions with the other arm.
If you have limited gripping ability try using the Active Hands D-Ring Aids and a Carabiner to make this exercise as safe as possible.