Cable Bicep Curl

Set a cable pulley to the lowest position and attach a straight bar or EZ-bar attachment. Stand facing the machine with feet shoulder-width apart, gripping the bar with an underhand grip. Keeping your elbows pinned at your sides, curl the bar up to shoulder height by flexing your biceps. Lower with control, feeling the cable maintain tension all the way to full arm extension.

Pro Tips

• The key advantage over a barbell curl: the cable provides constant tension through the full range
• Keep your elbows completely stationary — they act as hinges, not levers
• Squeeze the biceps hard at the top before controlling the descent

Muscles worked

Primary: Biceps brachii — both long and short heads are recruited in elbow flexion with a supinated grip. The key advantage of the cable over a barbell is that the cable maintains tension at full arm extension (at the bottom), whereas a barbell curl has near-zero tension when the arms hang straight.

Supporting: Brachialis (deep elbow flexor under the bicep, active regardless of forearm rotation), brachioradialis (forearm), forearm flexors (wrist stabilisation).

Common mistakes

Elbows swinging forward: The cable curl suffers from the same common error as all curl variations — the elbows drift forward as the weight increases. This recruits the anterior deltoid and shortens the bicep’s range. Elbows stay at the sides throughout.

Using too much weight: Cable curl weights are typically lower than barbell curl weights for the same lifter because the constant tension makes each rep more demanding. Using bodybuilding loading principles (close to failure at 10–12 reps) rather than trying to match barbell curl numbers is the right approach.

Rushing through the eccentric: The constant cable tension during the lowering phase is a unique advantage of this variation. Controlling the descent at 2–3 seconds per rep capitalises on it. A fast drop wastes the benefit.

Programming notes

The cable bicep curl is one of the best choices for pure bicep hypertrophy because constant tension through the full range of motion (including at the stretched position) produces greater stimulus per rep than a free-weight curl with its tension gap at the bottom. This makes it particularly valuable as the last bicep exercise in a session, when the goal is maximum stimulus with moderate weight.

Typical programming: 3–4 sets of 10–15 repetitions, often superset with a tricep exercise (cable pushdown or overhead extension) to maximise training efficiency in arm-focused sessions.

Frequently asked questions

Should I use a straight bar or EZ-bar for cable curls?

Both work, and the choice comes down to your wrist comfort. A straight bar places your forearms in full supination throughout the curl, maximising biceps brachii activation — but it can aggravate the wrists for lifters with limited forearm rotation. An EZ-bar puts your wrists in a semi-supinated position, which reduces stress on the wrist and elbow joints with only a small drop in bicep recruitment. If your wrists feel fine with the straight bar, use it. If they ache, switch to the EZ-bar without guilt.

How heavy should I go on cable curls compared to barbell curls?

Expect to use noticeably less weight — typically 20–30% less than your barbell curl — and that is entirely normal. The cable maintains resistance at the bottom of the rep where a barbell provides almost none, meaning your biceps are under load for a greater portion of each rep. Chasing barbell numbers on the cable stack is the wrong goal. Instead, select a weight that puts you close to failure in the 10–15 rep range with strict form.

Are cable curls better than dumbbell or barbell curls for building bicep size?

For pure hypertrophy, cable curls have a measurable advantage because they provide tension at the stretched position — where the muscle is longest and most susceptible to the mechanical stress that drives growth. Barbell and dumbbell curls lose tension at the bottom as gravity becomes favourable. That said, all curl variations build the biceps effectively, and you do not need to choose exclusively. Cable curls earn their place as a finishing movement; barbell or dumbbell curls work well as a heavier compound starter earlier in the session.