Stand facing a cable machine with a single‑handle attachment on a high pulley. Grasp the handle with one hand and step slightly forward with your opposite foot for stability. With your elbow close to your side and upper arm stationary, extend your arm downward until your elbow is fully straightened. Slowly return to the starting position with control. Alternate arms for each repetition to evenly work both triceps.
Log your cable alternate triceps extension sets in 1RM.fit and watch your estimated 1RM update automatically as you get stronger.