Single-Arm Overhead Cable Extension
- Beginner
- Cable
The single-arm overhead cable extension loads elbow extension from a low pulley. You stand with your back to the stack, take a single handle, raise the working arm overhead so the upper arm sits beside your head, then bend and straighten the elbow while the cable pulls down and behind you. Unlike a dumbbell, the cable keeps tension on the triceps at every joint angle, including lockout, which is why the guide warns against locking out hard.
How to do the Single-Arm Overhead Cable Extension
- Attach a single handle to the low pulley of a cable stack and select your weight.
- Take the handle in one hand and turn to face away from the machine.
- Raise the working arm overhead so the upper arm sits beside your head.
- Bend the elbow to let the handle travel down behind your head under control.
- Extend the elbow to press the handle back overhead, stopping short of a hard lockout.
- Complete the set, then swap hands and repeat on the other side.
Muscles worked
- Primary:
- Triceps
Why train it
- Cable tension stays on the triceps through the whole range, including lockout.
- The overhead position loads the long head of the triceps under stretch.
- Training one arm at a time makes side-to-side differences visible.
Common mistakes
- Letting the upper arm swing forward and back, which turns the lift into a shoulder movement.
- Snapping into lockout, which unloads the triceps and irritates the elbow.
- Standing too close to the stack, so the cable angle pulls the arm out of position.
- Leaning far forward to shift the weight, which recruits the torso rather than the arm.
Frequently asked questions
What muscles does the Single-Arm Overhead Cable Extension work?
The Single-Arm Overhead Cable Extension trains the triceps, and little else. No other group takes a meaningful share of the load, which is what makes this a clean way to target the triceps directly.
What equipment do I need for the Single-Arm Overhead Cable Extension?
Only a cable machine. Nothing beyond that is required to run the movement the way it is described above.
Is the Single-Arm Overhead Cable Extension suitable for beginners?
Yes. The Single-Arm Overhead Cable Extension is rated beginner, and the machine holds the path for you, so there is little to get wrong once the seat and the pin are set.
Can I do the Single-Arm Overhead Cable Extension at home?
Only if your home setup runs to a cable machine. Most do not, so this is usually a gym movement. The alternatives below cover the same muscles with kit you are more likely to have.
How many sets and reps of the Single-Arm Overhead Cable Extension should I do?
Three to four sets of 10 to 15 reps. Isolation work responds to reps and a controlled tempo rather than load, so stop each set a rep or two short of failure and keep the weight honest.
What are good alternatives to the Single-Arm Overhead Cable Extension?
Bench Dips, Dumbbell Decline Skullcrusher, and Machine Tricep Extension train the same primary muscles as the Single-Arm Overhead Cable Extension. Pick whichever one matches the equipment in front of you.