Barbell Preacher Curl
An isolation arm exercise performed on a preacher bench using a barbell with an underhand grip. The upper arms remain supported against the angled pad while the barbell is curled upward by flexing the elbows, minimizing momentum and maximizing tension on the biceps. The movement is completed with a slow and controlled lowering phase to fully stretch the arms and maintain constant muscle engagement throughout the range of motion.
How to Do the Barbell Preacher Curl
- Set the preacher bench seat so your armpits sit snugly over the top of the pad when seated.
- Grip a barbell underhand at about shoulder width and rest the backs of your upper arms flat on the pad.
- Start with your arms extended down the pad, elbows almost straight but not forcibly locked.
- Exhale and curl the bar up until your forearms are just short of vertical.
- Squeeze the biceps at the top for a moment.
- Inhale and lower the bar slowly through the full range, feeling the stretch near the bottom.
- Keep your upper arms and chest glued to the pad for every rep.
Common Mistakes
- Bouncing out of the stretch: reversing sharply at the bottom loads the biceps tendon at its most vulnerable point; lower with control and pause briefly.
- Lifting the elbows off the pad: hitching the upper arms upward to finish the rep recruits the shoulders and defeats the bench's purpose.
- Curling too high: bringing the bar all the way to the chin lets the forearms pass vertical and drops the tension; stop just before that point.
- Overloading the bar: preacher curls are significantly harder than standing curls, so cut your usual curl weight by roughly a third when starting out.
Programming Tips
The preacher curl removes the two biggest curl cheats, torso swing and drifting elbows, which makes it the strictest barbell curl variation you can do. Program 3 sets of 8 to 12 reps as the second or third movement in your arm training, and drop the load 20 to 30 percent from your standing barbell curl; the pad's isolation makes every kilogram feel heavier because nothing else can help.
The preacher position trains the biceps hardest in the stretched, bottom half of the rep, which pairs neatly with exercises that emphasize the squeeze at the top, like concentration curls or drag curls. An EZ bar is the smart default here since the angled grip spares the wrists and elbows over months of training. Whatever bar you use, lower under control for a full 2 to 3 seconds; the stretch position is where this exercise earns its reputation, and dive-bombing the descent throws that away while irritating the elbows.
Common Questions
Should I fully straighten my arms at the bottom?
Go to a near-full extension with control, stopping just short of aggressively locking out. The stretched position is the productive part of the preacher curl, but snapping into a hard lockout under load is how elbows get cranky.
Why is preacher curling so much harder than standing curls?
The pad fixes your upper arms in front of the body and eliminates momentum entirely, so the biceps carry the entire load through the hardest part of the range. Weaker numbers here are expected and not a problem.
Straight bar or EZ bar on the preacher pad?
The EZ bar is easier on the wrists and elbows and gives up almost nothing in biceps stimulus, making it the better long-term choice for most lifters. Use the straight bar only if it feels completely comfortable.
Track This Exercise in the App
Log your barbell preacher curl sets in 1RM.fit and watch your estimated 1RM update automatically as you get stronger.