Set the cable at knee height with no attachments (if you have access to a single hand rope attachment, use that instead).
2. Lean forward, place one foot in front, put your forearm over your thigh and grab the cable with your other arm. pull your elbow up to your side until your upper arm is parallel to the ground. This is the starting position.
3. Extend your elbow until your arm is completely straight. Squeeze your tricep for a moment and slowly bend your elbow back to the starting position.
4. Once finished, repeat the steps with your other arm.