Is a pushdown or an overhead extension better for building triceps size?

Both work, but overhead extensions tend to build more. In a 12-week study on 21 adults, each person did cable elbow extensions with one arm at the side, as in a pushdown, and the other arm overhead, and the overhead arm gained about 1.4 times more triceps volume (19.9% versus 13.9%), with the biggest gap in the long head. A good program keeps pushdowns for the lateral and medial heads and adds an overhead variation for the long head.

Why train one arm at a time instead of both?

Working one arm at a time stops the stronger side from doing extra work, which makes differences between arms easy to see and correct. It also lets you focus on keeping one elbow still, although the session takes about twice as long.

Can I use a rope attachment instead of a handle?

Yes, holding one end of a rope works the same muscles and lets the wrist turn freely, which some people find more comfortable on the elbow and wrist. Use whichever attachment lets you keep the elbow pinned and reach a full, controlled lockout.

Can I do this pushdown with an underhand grip?

Yes, a palm-up grip on the single handle is a common variation that trains the same muscles. Most people handle less weight with it because the grip and wrist tire sooner.

How many sets and reps should I do?

Three or four sets of 10 to 15 reps per arm suits most people, adjusted to your training goals and experience level. Start with your weaker arm and match its reps on the stronger side.

Cable Single-Arm Pushdown

What Is the Cable Single-Arm Pushdown?

Cable Single-Arm Pushdown is an isolation exercise that primarily targets the triceps, with the lateral and medial heads doing most of the work and the long head assisting. It is a beginner-level movement that builds arm strength and size one side at a time.

You stand at a high pulley holding a single handle, keep the upper arm by your side and straighten the elbow against the cable. Only the elbow moves, so the triceps have to do the work, and the cable keeps tension on the muscle from the bent-arm start to the straight-arm finish.

Because the long head of the triceps also crosses the shoulder, it sits at a short length when the arm hangs by the side. That is why pushdowns are usually paired with an overhead variation such as the Cable Overhead Triceps Extension, which trains the long head in a stretched position. Together they cover the triceps more completely than either one alone.

Working one arm at a time stops the stronger side from carrying the weaker one, so it is a practical way to find and even out a strength or size difference between arms. It usually comes near the end of an upper-body or arm session, after the pressing work, and it suits moderate loads for higher reps. Beginners who find it hard to keep the elbow still can learn the pattern first with the two-handed Cable Triceps Pushdown (Rope).

Muscles Worked

MuscleActivation

Triceps Brachii (Lateral Head): Primary
Triceps Brachii (Medial Head): High
Triceps Brachii (Long Head): Medium
Deltoid: Low
Flexor Carpi Ulnaris: Low
External Oblique: Minimal
Latissimus Dorsi: Minimal

Instructions

Attach a single handle to the high pulley of a cable machine and select a light weight.
Stand facing the machine with your feet about hip-width apart and grab the handle with one hand, palm facing down.
Stand tall with your chest up and place your free hand on your lower back or hip.
Pull your upper arm down to your side so the elbow sits against your ribs, bent until the handle is near shoulder height.
Keeping your upper arm still, push the handle down by straightening your elbow until your arm is fully extended beside your thigh.
Squeeze your triceps briefly at the bottom without snapping the elbow into lockout.
Let the handle rise slowly for about two seconds until your elbow is bent again, keeping the elbow at your side.
Complete your reps, then switch arms.

Common Mistakes

Letting the Elbow Drift
When the elbow swings forward or away from the side, the shoulder joins in and takes work off the triceps, so keep the upper arm pinned to your side and move only the forearm.
Leaning Over the Handle
Bending over the handle and pushing down with body weight turns the pushdown into a press, so stand tall and let the arm do the work.
Rolling the Shoulder Forward
Letting the shoulder dip toward the handle as the weight gets heavy recruits the chest and stresses the front of the shoulder, so keep the shoulder back and down throughout the set.
Using Too Much Weight
A load that forces body movement or a jerky start overloads the elbow tendon, so pick a weight you can move with the elbow alone.
Letting the Stack Pull You Up
Allowing the cable to yank the hand back up loses tension and snaps the elbow into deep bending, so control the return for about two seconds.
Cutting the Range Short
Stopping well before the arm is straight skips the hardest part of the rep, so finish each rep with the elbow fully extended but not snapped into lockout.

Injuries

Cable Single-Arm Pushdown is a low risk exercise when performed with proper technique.

The most common strain point is the back of the elbow, where the triceps tendon attaches. Loading too heavy, adding volume too quickly, or letting the arm snap into lockout at the bottom of every rep can irritate it. The shoulder is the other point to watch: when the weight is too heavy, the shoulder tends to roll forward and the body leans over the handle to help, which takes work off the triceps and loads the front of the shoulder.

Choose a weight you can move with only the elbow bending and straightening, finish each rep with a firm but controlled straight arm, and lower the handle slowly instead of letting the stack pull the elbow up. If a single handle bothers the wrist, a rope end or a different grip usually helps. To regress, lighten the load or use both arms with the Cable Triceps Pushdown (Rope). To progress, add weight gradually or move to overhead work such as the Cable Single-Arm Overhead Triceps Extension.

Stop the set if you feel sharp pain at the back of the elbow or in the front of the shoulder, and rest from the exercise if an ache at the back of the elbow is still there the next day.

Overview

Primary Focus: Triceps
Equipment: Cable
Modality: Strength
Difficulty: Beginner

Alternative Exercises

Frequently Asked Questions

Q: Is a pushdown or an overhead extension better for building triceps size?: Both work, but overhead extensions tend to build more. In a 12-week study on 21 adults, each person did cable elbow extensions with one arm at the side, as in a pushdown, and the other arm overhead, and the overhead arm gained about 1.4 times more triceps volume (19.9% versus 13.9%), with the biggest gap in the long head. A good program keeps pushdowns for the lateral and medial heads and adds an overhead variation for the long head.
Q: Why train one arm at a time instead of both?: Working one arm at a time stops the stronger side from doing extra work, which makes differences between arms easy to see and correct. It also lets you focus on keeping one elbow still, although the session takes about twice as long.
Q: Can I use a rope attachment instead of a handle?: Yes, holding one end of a rope works the same muscles and lets the wrist turn freely, which some people find more comfortable on the elbow and wrist. Use whichever attachment lets you keep the elbow pinned and reach a full, controlled lockout.
Q: Can I do this pushdown with an underhand grip?: Yes, a palm-up grip on the single handle is a common variation that trains the same muscles. Most people handle less weight with it because the grip and wrist tire sooner.
Q: How many sets and reps should I do?: Three or four sets of 10 to 15 reps per arm suits most people, adjusted to your training goals and experience level. Start with your weaker arm and match its reps on the stronger side.