If available, you can use a cable machine for this exercise.
Alternatively, fix a resistance band to a solid object at knee height.
Lie on your front with your toes on the floor.
Place your forearms on the floor and push up, lifting your torso and legs into a plank position.
Your feet can be placed slightly wider apart to help keep your balance.
Maintain a neutral spine and engage your deep abdominal, buttock and shoulder blade muscles throughout this exercise.
Reach forward with your affected arm to grasp the handle.
Turn your palm downwards to face towards the floor.
Bend at your elbow, bringing it into your side whilst keeping your forearm parallel with the floor.
Pause, then return to the start position with control.
Repeat.