Arms · Elbow flexion

Cable Preacher Curl

The cable preacher curl is a strict biceps exercise where you rest your upper arms on a preacher pad and curl a bar attached to a low pulley. The pad stops you swinging, and the cable keeps tension on the biceps at the bottom and the top, making it an isolation exercise with little room to cheat.

Also known as: Preacher curl with cable, Cable preacher curl bar, Low pulley preacher curl

Muscle group: Arms
Movement pattern: Elbow flexion
Type: Isolation
Equipment: Cable machine, Preacher bench, Straight bar or EZ bar
Difficulty: Intermediate

What muscles does the cable preacher curl work?

Primary movers

Biceps brachii

Assisting muscles

Brachialis
Brachioradialis
Forearm flexors

The preacher pad locks your upper arms in front of you, so the biceps do the whole job with no help from the shoulders or momentum.

A cable provides constant tension, including at the bottom where a barbell preacher curl can feel heavy on the elbow and at the top where it gets easy.

The biceps are lengthened at the start of each rep. That stretch helps growth but can also put stress on the biceps tendon, so control is key.

The brachialis and brachioradialis assist throughout. Straight bar or EZ bar changes the feel in the wrist.

How to do the cable preacher curl

Setup

1
Position a preacher bench in front of a low pulley and attach a straight bar or EZ bar.
2
Sit and place the backs of your upper arms flat on the pad.
3
Grip the bar with an underhand grip, shoulder-width.
4
Start with your arms nearly straight.

Execution

1
Curl the bar up toward your shoulders.
2
Squeeze your biceps at the top.
3
Lower slowly until your arms are nearly straight.
4
Do not fully lock out at the bottom.
5
Keep your upper arms on the pad.
6
Do not lift your torso.

Common cable preacher curl mistakes

Fully locking out

Dropping into a straight arm at the bottom stresses the biceps tendon.

The fix: Stop just short of lockout and keep tension.

Lifting the upper arms

Raising the elbows off the pad removes the strict control.

The fix: Keep the backs of your arms on the pad.

Too heavy

Heavy loads cause you to heave your torso.

The fix: Use a weight you can curl strictly for 8 to 12 reps.

Dropping fast

Letting the cable drag your arms down is risky.

The fix: Take two to three seconds to lower.

How many sets and reps?

Goal	Sets	Reps	Load	Rest
Hypertrophy	3	8–12	Moderate, 1–2 RIR	60–90 s
Pump	2–3	12–15	Light to moderate	45–60 s
Beginner	2	10	Light	60 s

Use it after your heavier curls. Keep the weight modest and avoid the full-lockout bottom position. If you feel tendon strain, stop and reduce the load.

Running the cable preacher curl in your next block? Hercules logs every set, shows last session's numbers before you lift, and suggests when to add weight.

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Frequently asked questions

What does the preacher curl work?

The biceps, with the brachialis and forearms assisting.

Cable or barbell preacher curl?

Cables keep constant tension. Barbells allow heavier loads. Both are good.

Should I lock out at the bottom?

No. Stop just short, to protect the biceps tendon.

What bench angle is best?

Adjust so the pad sits under your armpits and your arms rest flat.

How heavy should I go?

Moderate and strict. This is not the exercise to lift heavy.

Hercules tracks every cable preacher curl you log, shows you last session's numbers before you lift, and flags when your progress stalls.