Performing the: A Step-by-Step Tutorial Cable Half Kneeling External Rotation
Kneel down on one knee (the same side as the hand that will be doing the lifting) about two feet away from the machine, with your other foot flat on the ground in front of you.
Grasp the cable handle with the hand of the arm that's on the same side as the kneeling knee, ensuring that your elbow is bent at a 90-degree angle and tucked into your side.
Slowly rotate your forearm outward, away from your body, keeping your elbow stationary and close to your side, until your forearm is parallel with the ground.
Pause for a moment, then slowly return your forearm to the starting position to complete one rep. Remember to keep your core engaged and your back straight throughout the exercise.