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Katana extensions

Also called katana extension, cable katana extension, cross-body overhead cable extension.

What are katana extensions?

Katana extensions are single-arm cable triceps extensions performed overhead on a diagonal line that crosses the body's midline. The upper arm stays raised while the elbow bends and straightens, giving the movement the sword-drawing path behind its name.

Two-frame anatomical illustration of a standing single-arm Katana cable extension, from a bent elbow behind the head to a straight arm diagonally overhead, with the triceps highlighted.

How do you perform katana extensions?

Set up

  1. Attach one handle to a low cable. Stand with your back partly toward the pulley and take the handle in the opposite-side hand.
  2. Step forward into a stable staggered stance and bring the working upper arm beside your head, with the elbow bent and the handle behind your head.
  3. Brace your torso and adjust your position until the cable runs diagonally across your body into the working hand without rubbing your head or shoulder.

Execution

  1. Keep the upper arm raised and straighten the elbow, sending the handle forward and diagonally overhead.
  2. Finish with the elbow straight without twisting the torso or turning the movement into a shoulder raise.
  3. Bend the elbow under control until the handle returns behind your head. Complete the set, then change sides.

Common mistakes

  • Turning it into an arm swing

    If the whole upper arm sweeps forward, shoulder movement replaces the elbow extension that defines the exercise.

  • Standing where the cable rubs the body

    Move a small step or change the pulley height until the cable reaches the handle cleanly on its diagonal path.

  • Twisting to finish the rep

    Torso rotation can make the handle travel farther without the elbow straightening. Shorten the range or reduce the load.

Where it fits in a session

As unilateral triceps work after pressing, or alongside another elbow-extension variation.

Use a load that lets the upper arm remain raised and the cable clear the body. Match the setup on both sides before increasing resistance.

Muscles worked

Front
Front — Schematic surface view. Some muscles are partly visible or not shown.
Back
Back — Schematic surface view. Some muscles are partly visible or not shown.

Primary

Secondary

  • None listed in this guide

Select a muscle name to locate it.

Schematic surface view. Some muscles are partly visible or not shown.

The shoulder holds the upper arm overhead while the triceps straightens the elbow against the diagonal cable line.

Variations

  • Bilateral Katana extension — Uses two cables crossed behind the head and extends both elbows together.
  • Anatomical illustration of a man performing a one-arm cable tricep extension from a high pulley, with the back of the working upper arm highlighted.
    Single-arm triceps extensionUses a high cable with the upper arm beside the torso rather than overhead.
  • Anatomical illustration of a lying barbell triceps extension, two frames side by side. A man lies face up on a flat bench set inside an upright rack, feet flat on the floor, holding a loaded barbell with a close overhand grip. In the left frame the elbows are bent and the bar is lowered toward his forehead, the upper arms angled back over his head; in the right frame the arms are pressed to straight above his chest. Skin is cut away to show the muscles, and in both frames the triceps along the back of each upper arm is shaded red while everything else stays grey.
    Overhead triceps extensionUses a dumbbell, bar or rope in a more direct overhead path.
  • Anatomical illustration of a cable triceps pushdown, drawn as two frames side by side on white. A muscle-anatomy figure in shorts stands facing a cable tower, seen from his left side, holding a black angled bar with an overhand grip on a cable running from a pulley at the top of the tower. In the left frame the elbows are bent past a right angle and the bar is at chest height, with the weight stack down. In the right frame the elbows are straight and the bar is down at the front of the thighs, with the stack raised. In both frames the upper arm stays down at the side and the back of the near upper arm is highlighted in red, from the shoulder to the elbow — the triceps.
    Triceps pushdownKeeps the upper arms beside the torso and presses a high cable down.

Frequently asked questions

Why are they called Katana extensions?

The handle travels on a diagonal overhead path like drawing and raising a sword. The name describes the cable line, not a separate joint action.

What muscles do Katana extensions work?

They train the triceps brachii by straightening the elbow while the upper arm is held overhead.

Should the cable be high or low?

This guide shows a low pulley. Other heights can work if the cable follows the forearm's diagonal line and clears the body, but changing the height may require a different stance.

Can you do Katana extensions with both arms?

Yes. A bilateral version uses two cable stations and crossed handles. One arm at a time needs less space and makes each cable path easier to set.

How are Katana extensions different from overhead extensions?

Both straighten an overhead elbow. The Katana version is defined by a diagonal, cross-midline cable line rather than a handle or rope moving straight behind the head.

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