Can I do this exercise seated instead of standing?

Yes, a seated version can reduce body movement and increase arm isolation.

Is this exercise good for forearms too?

Yes, for the upper outer forearm, where the brachioradialis works hard as an elbow flexor in this curl. The wrist flexors and extensors only grip and steady the wrist, so add a Dumbbell Palms-Up Wrist Curl or a Cable Curl (Reverse Grip) if forearm size and grip strength are the goal.

Should I pull the rope apart at the top?

It is optional. Letting the rope ends drift slightly apart as your hands rise can feel smoother, but keep your wrists straight and your elbows at your sides, and treat the rep as finished when your hands reach your shoulders, not when the rope is spread wide.

Can hammer curls replace regular biceps curls?

No. The neutral grip takes the biceps brachii out of its strongest, palms-up position, so a palms-up curl such as the Cable Curl still loads the biceps more directly, and most arm programs use both.

How many reps should I do?

Most lifters use 3 or 4 sets of 6 to 15 reps. End the set when you can no longer finish a rep without leaning back or moving your elbows.

Cable Rope Hammer Curl

What Is the Cable Rope Hammer Curl?

Cable Rope Hammer Curl is an isolation exercise that primarily targets the biceps muscle group, with the brachialis and the brachioradialis of the forearm doing much of the work alongside the biceps brachii. It is a beginner-level movement: you stand facing a low pulley and curl a rope attachment with your palms facing each other, while the cable keeps the elbow flexors loaded through the whole rep.

The neutral grip changes how the elbow flexors share the load. The brachialis attaches to the ulna, the forearm bone that does not rotate, so it works hard in every curl whatever the grip, while the biceps brachii is strongest with the palms facing up and loses some leverage when they face each other. A study of competitive bodybuilders doing standing cable curls found that a palms-up bar produced more biceps activity than this rope grip during the lifting phase, and slightly more brachioradialis activity as well. The hammer grip therefore moves a larger share of the work away from the biceps brachii rather than making the forearm work harder outright.

Compared with the Dumbbell Hammer Curl, the cable changes where the exercise is hardest. A dumbbell's resistance fades as the forearm nears vertical at the top, while a low pulley keeps pulling through the upper part of the curl, especially when you stand a short step back from the machine. The weight stack also makes small load increases easy, which helps when progressing an isolation exercise.

The exercise usually sits near the end of an arm or pull session as an accessory, after or alongside a palms-up curl such as the Cable Curl. It also suits lifters who find palms-up curls uncomfortable on the wrists, because the neutral grip takes forearm rotation out of the movement. Beginners can learn it in a single session, and anyone who cannot curl without swinging should start lighter or try it seated.

Muscles Worked

MuscleActivation

Brachialis: Primary
Brachioradialis: Primary
Biceps Brachii: High
Deltoid: Low
Flexor Carpi Radialis: Low
Extensor Carpi Radialis: Minimal
Flexor Carpi Ulnaris: Minimal

Instructions

Attach a rope to a cable pulley and set it to the lowest position.
Hold one end of the rope in each hand with a neutral grip, palms facing each other and thumbs pointing up.
Stand facing the machine a short step back, feet about hip-width apart and knees slightly soft, with your arms hanging straight and your hands beside your thighs.
Keep your elbows at your sides and your wrists in line with your forearms.
Curl the rope up by bending only at the elbows, palms still facing each other, until your hands reach the front of your shoulders.
Pause briefly at the top without letting your elbows move forward.
Lower the rope slowly until your arms are straight, without letting the weight stack rest.
Repeat for the desired number of reps, keeping your torso still throughout.

Common Mistakes

Using excessive weight
Too much weight often leads to momentum and reduces the effectiveness of the curl.
Leaning back
Leaning back to lift the weight shifts tension away from the arms and risks injury.
Elbows drifting forward
Letting the upper arms swing forward turns the top of the curl into a front raise and shifts work to the front of the shoulders.
Rushing the lowering phase
Letting the stack pull the rope down quickly wastes half of each rep and jolts the elbows at the bottom.
Cutting the bottom short
Stopping before the arms are straight skips the lengthened part of the curl, where the elbow flexors are under stretch.
Bending the wrists
Curling the wrists up or letting them sag moves the load onto the wrist and changes the neutral grip the exercise depends on.

Injuries

Cable Rope Hammer Curl is a low risk exercise when performed with proper technique.

The usual strain points are the front of the elbow, where the elbow flexor tendons attach, and the brachioradialis along the outer forearm, which can become sore from repetitive overuse or from a sudden jump in load. Leaning back to start the rep loads the lower back, and letting the elbows drift forward shifts stress to the front of the shoulder. Choose a weight you can curl without swinging, lower it under control instead of letting the stack pull your arms straight, and keep your wrists in line with your forearms rather than twisting them. A proper warm-up before training arms is also helpful to reduce stiffness and risk of injury.

If the standing version turns into a swing, sit on a bench in front of the pulley or stand with your back against a wall, or start with the lighter Band Hammer Curl. To progress, add load in small increments, slow the lowering phase or pause briefly at the top.

Stop the set if you feel sharp pain at the front of the elbow, pain along the outer elbow and forearm that lingers after training, or numbness or tingling in the hand. A sudden pop at the front of the elbow, especially with bruising or a change in the shape of the biceps, needs prompt medical assessment.

Overview

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

Alternative Exercises

Frequently Asked Questions

Q: Can I do this exercise seated instead of standing?: Yes, a seated version can reduce body movement and increase arm isolation.
Q: Is this exercise good for forearms too?: Yes, for the upper outer forearm, where the brachioradialis works hard as an elbow flexor in this curl. The wrist flexors and extensors only grip and steady the wrist, so add a Dumbbell Palms-Up Wrist Curl or a Cable Curl (Reverse Grip) if forearm size and grip strength are the goal.
Q: Should I pull the rope apart at the top?: It is optional. Letting the rope ends drift slightly apart as your hands rise can feel smoother, but keep your wrists straight and your elbows at your sides, and treat the rep as finished when your hands reach your shoulders, not when the rope is spread wide.
Q: Can hammer curls replace regular biceps curls?: No. The neutral grip takes the biceps brachii out of its strongest, palms-up position, so a palms-up curl such as the Cable Curl still loads the biceps more directly, and most arm programs use both.
Q: How many reps should I do?: Most lifters use 3 or 4 sets of 6 to 15 reps. End the set when you can no longer finish a rep without leaning back or moving your elbows.