Machine Preacher Curl

What is the Machine Preacher Curl?

The machine preacher curl trains the biceps on a fixed, cam-driven path with the upper arms braced on a preacher pad. The guided arc removes the balancing demands of a free bar and lets you focus purely on a strict, controlled contraction, making it a beginner-friendly and finisher-friendly way to isolate the biceps.

Muscles worked

Primary: Biceps

The biceps flexes the elbows against the machine’s resistance while the pad holds the upper arms fixed, forcing a strict contraction with no help from the shoulders or torso.

How to perform the Machine Preacher Curl

1. Adjust the seat so the pad sits under your armpits and the axis of the machine lines up with your elbows.
2. Grip the handles with a supinated grip and rest the backs of the upper arms flat against the angled pad.
3. The fixed machine path locks the arm angle, which makes it easy to grind slow eccentrics and drop sets without stabilizing.
4. Curl the handles up by flexing the elbows while keeping the upper arms pressed into the pad.
5. Squeeze the peak contraction, then resist the lever on the way down rather than letting it slam back.
6. Stop just short of full elbow lockout at the bottom to protect the tendon under the machine load.

Suggested working range: 10–15 reps. Default progression: double progression.

Mechanics

A single-joint isolation on a selectorized machine: elbow flexion along a fixed path with the back of the upper arms supported on a pad. The guided arc and pin-loaded stack make it the easiest preacher variation to load precisely and to take safely close to failure.

Form cues

• •Set the seat so your armpits rest at the top of the pad and the arms lie flat.
• •Grip the handles and curl by flexing only the elbows along the machine’s path.
• •Squeeze at the top, then lower under control toward a near-full extension.
• •Don’t lift your chest off the pad or shrug to help the weight up.

Common mistakes

• •Setting the seat wrong so the elbows do not line up with the machine pivot.
• •Lifting the upper arms off the pad to cheat with shoulder movement.
• •Slamming the lever into a hard bottom lockout instead of stopping short.
• •Letting the lever drop fast rather than resisting the eccentric.

Variations & alternatives

• •Barbell or EZ-bar preacher curl, the free-weight version that adds a balance demand.
• •Dumbbell preacher curl, one arm at a time to even out imbalances.
• •Cable preacher curl, constant cable tension across the braced range.
• •Spider curl, a momentum-free curl loading the top of the range.

Barbell Curl

Biceps · Barbell

Dumbbell Curl

Biceps · Dumbbell

Hammer Curl

Biceps · Dumbbell

Cable Curl

Biceps · Cable

Incline Dumbbell Curl

Biceps · Dumbbell

Programming: sets, reps & when to use it

Program the machine preacher curl in the library’s 10–15 rep range as a strict biceps accessory or finisher. The fixed path makes it safe to push close to failure and to drop-set, so chase a full range and a clean squeeze rather than sloppy heavy reps. Run it after your heavier curls or pulling work.

Frequently asked questions