ProgreviaLow cable curl: proper form, muscles worked and common mistakes
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How to do it
The low pulley keeps constant tension through the whole range, even at the bottom. Elbows fixed at your sides; curl by contracting the biceps and lower under control without letting the weight pull the shoulder.
Muscles worked
Main muscle: biceps. When it plans weekly volume, every set of this exercise counts in full for biceps: the generator does not split it with other muscles.
Low cable curl: tension from the bottom, and a natural fit for drop sets
What separates it from the Overhead cable curl is where the cable pulls. On the low pulley the resistance comes from below, so the biceps works under tension from the very start and keeps it all the way up; in the high version the hard part is at the top. Compared with the Incline dumbbell curl, which stretches the biceps with the arm behind the torso, here the elbow stays by your side and the path is more neutral. And versus a free barbell, the cable does not lose load at the end of the lift, which is where the bar's weight nearly disappears.
It is one of the easiest curls to take to failure safely, because you can let go of the handle without risk, and changing the weight with the pin makes it ideal for drop sets. You can use a straight bar, an EZ bar, a rope or a single handle: the rope lets you turn the grip toward neutral.
One detail specific to this curl: do not crowd the machine; step back just enough that the weights never settle. If you feel your shoulder drifting forward, correct it by pinning the elbows to your sides. Add load when you finish the range without swinging.
Technical sheet
- Movement pattern
- Isolation
- Minimum level
- Beginner
- Technical demand
- Basic
- Fatigue it generates
- Low (0.5 out of 2.2)
- Risk if technique breaks down
- Low
- Peak tension in the stretched position
These are the values the generator uses to decide where the exercise goes within the session.
Recommended sets and reps
As an isolation exercise, it works best in 3–4 sets of 10–15 reps with 0–2 RIR. Use it at the end of the session to add volume without systemic fatigue.
Common mistakes to avoid
- Swinging the body and letting the elbows drift forward, turning the curl into a shoulder movement.
- Letting the weight stack touch down between reps: the cable loses its constant tension, which is its whole advantage.
- Cutting short the part of the range where the muscle is stretched: that is exactly where this exercise gives the most stimulus.
What the research says
This is an isolation exercise. For beginners, adding it on top of compound lifts does not always help: in the trial by Gentil and colleagues (2013), people who only did lat pulldowns gained as much arm size as those who also did curls. It earns its place with experience, and for muscles the big lifts leave short.
Its peak tension comes with the muscle stretched, and that matters: in the trial by Maeo and colleagues (2021), seated leg curls, which stretch the hamstrings more, built more muscle than lying curls, and Pedrosa and colleagues (2022) saw something similar in the quads when training the long end of the range.
You do not need to reach failure on every set: according to the meta-analysis by Refalo and colleagues (2023), stopping one or two reps short gives very similar growth. The generator prescribes it with RIR for that reason.
- Gentil P, Soares SR, Pereira MC, et al. Effect of adding single-joint exercises to a multi-joint exercise resistance-training program on strength and hypertrophy in untrained subjects. Applied Physiology, Nutrition, and Metabolism. 2013;38(3):341-344.
- Maeo S, Huang M, Wu Y, et al. Greater hamstrings muscle hypertrophy but similar damage protection after training at long versus short muscle lengths. Medicine & Science in Sports & Exercise. 2021;53(4):825-837.
- Pedrosa GF, Lima FV, Schoenfeld BJ, et al. Partial range of motion training elicits favorable improvements in muscular adaptations when carried out at long muscle lengths. European Journal of Sport Science. 2022;22(8):1250-1260.
- Refalo MC, Helms ER, Trexler ET, Hamilton DL, Fyfe JJ. Influence of resistance training proximity-to-failure on skeletal muscle hypertrophy: a systematic review with meta-analysis. Sports Medicine. 2023;53(3):649-665.
How Low cable curl compares with other biceps exercises
Of the 16 biceps exercises in the catalogue, ranked from least to most fatiguing by the values the generator uses, Low cable curl is number 4 (tied with 9 others).
That makes it a good candidate for adding biceps sets at the end of a session or in heavy weeks, when you want volume without extra fatigue.
With different equipment, the same movement pattern offers 13 alternatives, such as Band concentration curl, Resistance band biceps curl and Band hammer curl.
| Exercise | Equipment | Fatigue | Technique |
|---|---|---|---|
| Alternating dumbbell curl | dumbbells | Low (0.5 out of 2.2) | Basic |
| Concentration curl | dumbbells | Low (0.5 out of 2.2) | Basic |
| Preacher curl | barbell | Low (0.5 out of 2.2) | Basic |
| Overhead cable curl | cable | Low (0.5 out of 2.2) | Basic |
| Low cable curl | cable | Low (0.5 out of 2.2) | Basic |
| Incline dumbbell curl | dumbbells | Low (0.5 out of 2.2) | Basic |
| Reverse barbell curl | barbell | Low (0.5 out of 2.2) | Basic |
| Hammer curl | dumbbells | Low (0.5 out of 2.2) | Basic |
Tension with the muscle stretched. Low cable curl loads the muscle when it is longest. In the review by Kassiano et al. (2023), across eleven studies, full range of motion and partials performed in the initial part of the movement — with the muscle long — produced more growth than partials performed at the end.
An isolation exercise. In the trial by Gentil et al. (2015), with untrained young men over ten weeks, the biceps curl and the lat pulldown were equally effective for gaining strength and size in the elbow flexors: isolation is not filler.
- Kassiano W, Costa B, Nunes JP, Ribeiro AS, Schoenfeld BJ, Cyrino ES. Which ROMs lead to Rome? A systematic review of the effects of range of motion on muscle hypertrophy. Journal of Strength and Conditioning Research. 2023;37(5):1135-1144.
- Gentil P, Soares S, Bottaro M. Single vs. multi-joint resistance exercises: effects on muscle strength and hypertrophy. Asian Journal of Sports Medicine. 2015;6(2):e24057.
Related guide
Best biceps and triceps exercises for bigger arms
Alternative exercises
More isolation exercises
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Frequently asked questions
What muscles does Low cable curl work?
Low cable curl mainly works the biceps muscle group, plus synergist and stabilizer muscles depending on the variation.
How many sets of Low cable curl should I do?
Between 3 and 5 sets per session, adjusting the total weekly volume for biceps to your level (about 10–20 sets per muscle per week).
Is the low cable curl better than the barbell curl?
It is neither better nor worse, just different. The cable keeps tension through the whole rep and lets you change weight quickly; the free bar allows heavier loads and demands more coordination. Combining them on different days, or putting one at the end of a session, is a common approach.
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