Master Preacher Curls for Bigger Better Biceps

Preacher curls have a reputation as the cheat proof biceps builder because they get rid of body language. Once your upper arms are locked onto the pad, you can't rely on hip swing, shoulder shrug, or elbow drift to sneak the weight up. Your biceps are on the hook for every rep.

Because they keep you so honest, preacher curls are one of the best moves for growing the lower portion of your biceps and building massive strength through the stretched position. The tradeoff is you'll need to swallow your ego and drop the load, because full-range preacher curls at a weight you can actually control will humble almost anyone.

What Is a Preacher Curl?

The preacher curl is an elbow flexion exercise you perform on an angled bench with your upper arms and armpits resting on the pad and your chest pressed against the support. You grip a barbell, dumbbell, EZ-bar, or cable handle with an underhand grip, then curl toward your face. The pad locks your shoulders and upper arms in place, so the only joint that moves is your elbow, which helps isolate the muscles even more.

Preacher Curl Muscles Worked and Benefits

Preacher curls hit your biceps brachii, brachialis, and brachioradialis, with your forearm flexors helping stabilize the grip. Because of the arm angle on the pad, the exercise loads your biceps hardest in the lengthened position near the bottom of the rep, which is a big deal for hypertrophy.

Compared to incline curls, preacher curls produce more growth in the lower (distal) portion of your biceps, while incline curls tend to grow the upper portion more. If you only pick one, preacher curls give you that meaty lower biceps most lifters are chasing. Training your biceps in the stretched initial range of motion also builds full-range strength better than only training the top half.

Preacher curls are worth adding to your lifts if you:

• Want more growth in your lower biceps (near the elbow crease)
• Struggle to keep your form strict on standing curls
• Are chasing hypertrophy and want to load the biceps under a stretch
• Have plateaued on curls and need more isolation to break through

How to Do Preacher Curls with Proper Form

Preacher curl form is simple but demands honesty. Set your bench, brace your body, and move slowly through a full range of motion. Pick a weight that lets you go all the way down without bouncing out. If not, drop the load.

Set Up the Bench

Adjust your adjustable weight bench or preacher attachment so the top of the pad sits just under your armpits when seated. Your feet should be flat on the floor and your chest should press lightly against the pad. Grip a barbell, EZ-bar, dumbbell, or cable handle just outside shoulder width with an underhand grip.

Lock Your Position

Sit tall, press your chest into the pad, and let your upper arms rest flush along the incline. Your armpits should touch or nearly touch the top of the pad. Brace your core so your torso stays quiet through the entire set.

Lower Under Control

From the top position, lower the weight slowly (aim for 2 to 3 seconds down). Extend your elbows almost fully and stop just before you hyperextend. This is where most lifters get lazy and cut the range short. Don't. That bottom stretch is where the growth lives.

Curl With Intent

From the fully lengthened bottom, hold for a beat (this stops the pulsatile bounce that can spike stress on your elbows), then curl the weight back up under control. Squeeze at the top for a second, then start the next slow descent. Aim for 8 to 12 reps with 90 seconds to 2 minutes of rest between sets.

Preacher Curl Variations and Alternatives

Each preacher curl alternative below shifts the tension curve slightly and lets you keep training the same pattern without the exercise getting stale. Try one as a substitute or add several into your rotation.

Dumbbell Preacher Curl

The dumbbell preacher curl lets you work one arm at a time or both together, which is great for evening out size differences between your left and right biceps. Grab a dumbbell, rest your arm on the pad, and curl. Because your wrist can rotate freely, dumbbells often feel more elbow-friendly than a straight bar.

Single Arm Preacher Curl

The single arm preacher curl is the same as the dumbbell version but performed one side at a time so you can dial in full attention on each biceps. This variation is ideal for fixing size or strength imbalances between arms, and it lets you crank out a few extra reps on your weaker side to help catch it up.

Barbell Preacher Curl

Using a straight barbell or EZ-bar gives you the most stable setup for heavier loads. Barbell preacher curls also build long-length strength faster than cable preacher curls, though both grow the biceps similarly. If your wrists complain about a straight bar, the EZ-bar is a joint-friendly swap.

Cable Preacher Curl

Cable preacher curls keep constant tension on your biceps through the whole range of motion, which is a big advantage over the free-weight version where tension drops at the top. Set a functional trainer pulley to the lowest setting, clip on a straight or EZ bar handle, and curl.

Reverse Preacher Curl

Flip your grip to overhand (pronated) and you shift the emphasis to your brachialis and forearm extensors, muscles that add depth to your upper arm and grip. Use lighter weight than you would for standard preacher curls and treat this variation as a finisher after your working sets.

Standing Preacher Curl

If you don't have a dedicated preacher pad at your home gym, prop an incline bench at a steep angle and drape your working arm over the top edge to mimic the setup. It won't be quite as locked in as a real preacher bench, but it gets the job done. You can also do a standing dumbbell curl with your working arm braced on a fixed surface for a similar effect.

Programming Preacher Curls

For hypertrophy, program 3 to 4 sets of 8 to 12 reps at 1 to 2 reps in reserve, 2 to 3 times per week as part of your arm or upper-body training. For a strength focus, drop to 6 to 8 reps for 3 to 4 sets with heavier loads. Emphasize the eccentric (2 to 3 seconds down) and use a full range of motion on every rep. 

If you want the biggest lower-biceps stimulus, train the initial (bottom) portion of the range and hold briefly at the stretched position. For a more balanced arm builder, alternate preacher curls with incline dumbbell curls week to week, and add barbell curls as a heavier compound curl option.

Takeaway

Preacher curls are the exercise for lifters who want to do away with the cheat codes and grow meatier lower biceps. Just remember to reduce your usual weight so you can go all the way into the stretch without bouncing. Rotate dumbbell, single arm, and cable versions of the preacher curl keep things interesting and can help you find the best stimulus for your anatomy and joints. Add them to your arm day once or twice a week and give it eight to twelve weeks to see the payoff.

FAQs

Can I Use Dumbbells for Preacher Curls Instead of a Barbell?

Yes, dumbbell preacher curls are a great substitute for the barbell version and give you a few upsides. Dumbbells let each arm work independently, which helps fix size or strength imbalances, and your wrist can rotate to a more natural position, which is easier on the elbows. Load progression is a bit slower than with a barbell since dumbbell jumps are usually 5 pounds at a time, but for hypertrophy that's plenty.

How Do I Perform a Proper One Arm Preacher Curl?

Set your bench pad just under your armpit on the working side. Grip a dumbbell in an underhand grip, place your upper arm flush on the pad, and press your chest into the support. Lower the dumbbell slowly (2 to 3 seconds) until your elbow is nearly fully extended, hold briefly at the bottom, then curl back to the top and squeeze. Keep your torso still and your shoulder pinned down through the whole set. Do 8 to 12 reps per arm and start with your weaker side.

What Are the Benefits of Doing Preacher Curls for Biceps?

Preacher curls lock your upper arms in place, which stops you from swinging or cheating and forces your biceps to do the actual work. The arm angle puts your biceps under tension in a lengthened position, which is a strong driver of muscle growth, especially in the lower portion of the biceps near the elbow. Preacher curls also build strength through the full range of motion and are one of the best isolation options for lifters chasing serious arm size.