A cable curl replaces the dumbbell with a line of pull that does not care about gravity, so there is no easy top of the rep — a free weight goes weightless as it comes over your elbows, and a cable simply does not. That constant tension is the entire argument for doing curls on a stack, and it is a real one.
How to do it
- Constant tension is the point — the cable does not unload at the top like a free weight.
- Stand far enough back that there is tension before the first rep.
Common mistakes
- Leaning back as the set gets hard, which hands the work to the shoulders.
What it trains
- Biceps
- flex the elbow against a load that stays heavy at the top of the rep
- Brachialis
- contributes through the middle of the range, whatever handle you use
- Forearms
- hold the bar or rope; on a rope they work harder because nothing stops it twisting
Variations and alternatives
Common questions
Are cable curls better than dumbbell curls?
Better at one thing — keeping load on the biceps at the top, where a dumbbell has gone slack. Worse at the stretched bottom position if you stand right over the pulley, because the cable angle takes tension off there. Doing one of each in a week covers both ends.
Where should I stand relative to the pulley?
A step back from it, not on top of it. Standing directly over the low pulley makes the cable vertical and turns it into a worse dumbbell curl; a step back tilts the line of pull so tension is still there at lockout, which is the reason you walked to the cable stack.
Should I use the bar, the rope or single handles?
The straight bar loads heaviest, the rope lets the wrists rotate freely and suits anyone whose wrists dislike a fixed bar, and single handles let you work one arm at a time and catch a strength difference. None of them beats the others for growth — pick the one your elbows and wrists are happy under.
In StackUp. Logged as weight and reps per set, and your heaviest working set decides whether the weight goes up next time. Get the app.
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