How to Do the Preacher Curl

How to do it

1. Adjust the preacher bench seat so that when you sit down and extend your arms over the pad, your armpits sit flush against the top edge of the pad, not floating above it or sinking below.
2. Grip the barbell with an underhand (supinated) grip, hands roughly shoulder-width apart, and lift it off the rack or have a partner hand it to you while your arms are already resting on the pad.
3. Let the bar descend under control until your elbows reach near-full extension, stopping just before the joint locks out completely, so the biceps stays under tension throughout.
4. Pause briefly at the bottom, resisting the urge to bounce or use momentum off the pad to initiate the next rep.
5. Drive the bar upward by curling at the elbow, keeping your upper arms pressed firmly into the pad the entire way up, not allowing the elbows to lift or flare away from the surface.
6. Curl until the forearms are roughly vertical or slightly past, squeezing the biceps hard at the top for a moment before beginning the descent.
7. Lower the bar slowly, taking at least two seconds on the way down, because the eccentric (lowering) phase against that stretched position is a large part of what makes preacher curls effective.
8. Return the bar to the rack or lower it safely to a spotter after your final rep rather than dropping it from the top of the movement.

Form cues

• Armpits glued to the pad top.
• Slow the descent, don't drop it.
• Elbows stay down, always.
• Squeeze hard at the top, then earn the way down.
• Stop just short of lockout at the bottom.

Common mistakes

• Using a grip that is too wide: A grip wider than shoulder width externally rotates the humerus, which reduces the biceps' mechanical advantage and shifts stress toward the outer head unevenly. Keep hands at roughly shoulder width.
• Bouncing out of the bottom: Letting the weight drop and then bouncing off the pad to reverse direction removes the very stimulus that makes this exercise special. It also places sudden stress on the elbow tendons at their most vulnerable angle. Lower with control and pause before reversing.
• Letting the elbows rise off the pad during the curl: Once the elbows lift, the front deltoid takes over and the biceps shortens before completing the movement. Actively press the elbows into the pad for the entire rep.
• Going too heavy too fast: Because the arm cannot assist the lift with body swing, the preacher curl exposes how much a lifter relies on momentum in other movements. Starting with more weight than the biceps can handle in strict isolation leads to sloppy form and aggravated elbows.
• Cutting the range of motion at the bottom: Many lifters reverse the bar when there is still a significant bend in the elbow, missing the stretched position that drives hypertrophy. The bar should travel until the arms are nearly straight.

Why do the Preacher Curl?

• The fixed pad position removes almost all momentum from the lift, meaning the biceps does the work from start to finish. This makes load-to-stimulus ratio very high compared to a standing barbell curl where body sway sneaks in.
• Training the biceps in a lengthened position, which the preacher curl's bottom range provides, is associated with greater muscle growth. The stretch reflex at the bottom of the pad represents a training stimulus that standing curls, which emphasize the shortened position, do not replicate as well.
• Because both arms work simultaneously with a single barbell, the preacher curl allows for meaningful progressive overload without requiring the coordination overhead of dumbbell variations.
• The braced position also gives lifters useful feedback: if the movement feels wrong or the elbows are lifting, the pad makes it impossible to miss. This built-in constraint helps newer lifters develop an awareness of what isolated biceps work actually feels like.
• Strength built in the lengthened range of the preacher curl tends to carry over to pulling movements, since the biceps contributes meaningfully at the bottom of rows and chin-ups where the arm is extended.

Preacher Curl variations

EZ-Bar Preacher Curl

The angled grip of an EZ-bar reduces wrist and elbow discomfort for lifters who find the straight barbell supinated grip irritating over high volume, making it a practical swap when training through minor joint sensitivity.

Dumbbell Preacher Curl (Single Arm)

Working one arm at a time allows lifters to address side-to-side strength imbalances that a barbell masks, and is commonly used as a regression when the barbell version is too advanced for strict form.

Cable Preacher Curl

Attaching a straight bar or rope to a low pulley and curling over a preacher pad maintains constant tension throughout the entire range, including at the top where a free barbell goes slightly slack, making it a useful progression for advanced lifters chasing peak contraction.

Incline Dumbbell Curl

Not performed on a preacher pad but achieves a similar lengthened-position stretch; it works as a regression for gyms that lack a preacher bench, though it sacrifices the bracing advantage that defines the true preacher curl.

How to program it

The barbell preacher curl tends to appear as an accessory movement rather than a primary lift, typically placed after heavier compound pulling work like rows or pull-ups when the back is fatigued but the biceps still have capacity for isolated work. Many lifters gravitate toward a 6 to 12 rep range for hypertrophy goals, though some use higher rep ranges in the 15 to 20 neighborhood to chase a sustained pump while keeping absolute load moderate. Because of the tension placed on the biceps tendon at the stretched position, most training approaches favor starting with lighter loads and building gradually rather than jumping straight to maximum weight. Pairing it with a movement that emphasizes the shortened position of the biceps, like a concentration curl, is a common structure in arm-focused sessions.

Preacher Curl alternatives

Dumbbell Curl

Dumbbell · Isolation

Hammer Curl

Dumbbell · Isolation

Cable Curl

Cable · Isolation

Incline Dumbbell Curl

Dumbbell · Isolation

Concentration Curl

Dumbbell · Isolation

Spider Curl

Dumbbell · Isolation