Single-arm cable triceps extension

The single-arm cable triceps extension is a single-joint isolation exercise for building the triceps. It involves driving a handle attached to a cable stack overhead to full extension. It is usually performed for moderate to high reps, such as 8-12 reps per set or more, as part of an upper-body or arm-focused workout.


  1. Builds stronger and more muscular triceps
  2. Targets the medial head of the triceps specifically
  3. The cable provides continuous tension throughout each rep

Single-arm cable triceps extension Images


Single-arm cable triceps extension Instructions

Single-arm cable triceps extension muscle diagram
  1. With your right hand, grasp a single handle attached to the high-cable pulley using a supinated (underhand; palms facing up) grip. You should be standing directly in front of the weight stack.
  2. Now pull the handle down so that your upper arm and elbow are locked in to the side of your body. Your upper arm and forearm should form an acute angle (less than 90-degrees). You can keep the other arm by the waist and you can have one leg in front of you and the other one back for better balance. This will be your starting position.
  3. As you contract the triceps, move the single handle attachment down to your side until your arm is straight. Breathe out as you perform this movement. Tip: Only the forearms should move. Your upper arms should remain stationary at all times.
  4. Squeeze the triceps and hold for a second in this contracted position.
  5. Slowly return the handle to the starting position.
  6. Repeat for the recommended amount of repetitions and then perform the same movement with the other arm.

Variations: You can use exercise bands to perform this exercise.