Cable Standing Single Arm Horizontal Triceps Extension exercise animation (Male)

Cable Standing Single Arm Horizontal Triceps Extension

Target muscle
—
Equipment
Cable
Body part
Upper Arms
Type
Strength

The cable standing single arm horizontal triceps extension is an isolation exercise for the triceps, worked one arm at a time. Standing at a cable machine, you extend your forearm horizontally against constant cable tension, which keeps load on the triceps through the full range and lets you train each side evenly.

How to do the Cable Standing Single Arm Horizontal Triceps Extension

  1. 1Set the cable pulley to roughly chest or shoulder height and attach a single handle.
  2. 2Stand side-on to the machine and grip the handle with the hand farthest from the pulley, palm facing down.
  3. 3Step away to take up the slack, then raise your upper arm so it points horizontally out toward the pulley, with your elbow bent and forearm across the front of your body.
  4. 4Brace your core and keep your upper arm fixed and parallel to the floor throughout the rep.
  5. 5Extend your forearm horizontally away from the pulley until your arm is fully straight, squeezing the triceps at the end.
  6. 6Pause briefly in the locked-out position without letting your upper arm drift.
  7. 7Bend your elbow under control to return the handle to the start, keeping tension on the triceps.
  8. 8Complete all reps on this arm, then switch the handle to the other hand and repeat.

Form tips

  • Keep your upper arm pinned in place and parallel to the floor so the movement happens only at the elbow.
  • Lead with the lockout and consciously squeeze the triceps at full extension before returning.
  • Control the return rather than letting the cable snap your arm back, keeping constant tension on the muscle.
  • Start lighter than you would with two arms, since training one side at a time exposes any strength imbalance.

Common mistakes

  • Letting the upper arm swing or drop during the rep, which shifts work off the triceps and onto the shoulder.
  • Using the torso or a twist of the body to drive the handle out, which turns the isolation move into momentum and reduces triceps tension.
  • Stopping short of full extension, which skips the part of the range where the triceps work hardest.
  • Choosing too heavy a load so the elbow flares and form breaks down, raising the risk of elbow strain.

Frequently asked questions

What muscles does the cable standing single arm horizontal triceps extension work?

It targets the triceps of the working arm. Because it is an isolation extension, the triceps do nearly all of the work as you straighten your elbow against the cable.

Why train one arm at a time instead of both together?

Working a single arm lets you focus fully on one triceps, even out left-right strength differences, and use a constant cable line of pull through the whole range.

Is this exercise good for beginners?

Yes. The cable controls the movement path and the single-arm setup is easy to learn. Start with a light weight, keep your upper arm still, and focus on a full lockout each rep.

How many sets and reps should I do?

As a triceps isolation movement it responds well to higher reps. Try 3 to 4 sets of 10 to 15 reps per arm, using a weight that lets you reach full extension with strict form.

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