Cable Curl

Move · Resistance Training · Movement, Typed Supps

A dumbbell gets easy at the top because the weight ends up directly under your elbow; a cable never lets that happen.

Stage by stage

Set-up (Pulley height sets the curve): The cable's line, not gravity, decides where the resistance against the elbow peaks.
During the set (Elbows fixed to the torso): Pinning the humerus keeps it elbow flexion; letting the shoulder move hands part of the load to the front delt.
Immediately after (No unloaded end range): The brief rest a dumbbell gives at full flexion never arrives, so time under tension per rep is higher.
Weeks later (Gradual elbow-flexor growth): A low-risk contributor to biceps size, working alongside heavier pulling rather than replacing it.

Muscles trained

Primary: biceps
Secondary: forearms

Intensity

3.5 METs (Resistance (weight) training, multiple exercises, 8-15 repetitions at varied resistance).

Time to effect

Weeks: In the first few weeks, expect the novelty of constant cable tension to make even a light rep range feel more demanding than free weights ever did.
Months: With months of consistent use, that unbroken tension curve is a solid, low-risk contributor to gradual biceps growth alongside your other pulling and pressing work.

Common myth

"Cable curls don't count as real resistance training because the weight stack isn't free weight." In reality: Load is load — the muscle can't tell whether tension comes from gravity pulling a dumbbell down or a cable pulling it sideways. Cable curls actually remove the brief rest free weights give you at the top and bottom of the rep, which is a genuine training advantage, not a lesser one.