Zottman Preacher Curl
The Zottman preacher curl locks your upper arm against a preacher bench pad, then adds a wrist flip at the top of the curl: you lift with your palms up and lower with your palms down. The bench removes any help from your shoulders or back, so your biceps do the lifting and your forearms take over control of the slow, pronated descent. It suits someone who already curls on a preacher bench comfortably and wants to add forearm work without a separate exercise. Because the bench forces strict form, it's not the easiest place to learn the grip switch for the first time.
Why it works
Resting your upper arm on the sloped preacher bench pad fixes your elbow position and removes any swing from your shoulders or torso, which is what makes a preacher curl such a strict biceps isolation movement in the first place. The Zottman twist adds a second training effect on top of that strict base: curling up with your palms facing up loads your biceps through the range a standard preacher curl already targets. Rotating your wrists to a palms-down grip at the top, then lowering slowly in that pronated position, shifts the work for that half of the rep onto your forearm muscles, in particular the ones that extend and stabilize your wrist. You get a strict biceps movement and a controlled eccentric forearm movement in the same set, without unloading the weight or reaching for a second piece of equipment.
Set up
- Set the preacher bench pad height so your armpit rests at the top edge of the pad and your upper arm lies flat against it.
- Hold a dumbbell in each hand with your arms extended over the pad, palms facing up.
- Pick a weight lighter than what you'd use for a regular preacher curl; the slow, pronated lowering phase is the harder half of this exercise.
- Keep your chest against the bench's front pad or backrest, whichever your bench has, so you're not leaning forward to start the rep.
How to do it
- Curl both dumbbells up along the pad with your palms facing up, stopping just short of your forearms going vertical.
- At the top, rotate your wrists so your palms face down.
- Lower the dumbbells slowly along the pad in that palms-down position, resisting the weight the whole way.
- Let your arms straighten fully at the bottom without letting your elbows snap into the pad.
- Rotate your wrists back to palms-up at the bottom to start the next rep.
- Keep your upper arms pressed against the pad for the entire set.
Form cues
- Upper arms stay glued to the pad from the first rep to the last.
- Rotate your wrists all the way at the top before you start lowering.
- Lower slower than you curled; the pronated descent is the point of this version.
- Stop the bottom stretch just before your elbows lock out hard against the pad.
Breathing: Exhale as you curl up, inhale as you control the pronated lowering back down.
Common mistakes
Letting the elbows lift off the pad to help finish the curl.
Fix: Drop the weight until you can complete every rep with your upper arms flat on the pad.
Dropping the weight fast once the wrists rotate to palms-down.
Fix: Slow the descent down on purpose; a fast drop skips the forearm work this version is built for.
Locking the elbows out hard against the pad at the bottom of each rep.
Fix: Stop just short of a hard lockout against the pad to keep the stress on the muscle instead of the joint.
Rotating the wrists only halfway, so the lowering phase is still partly supinated.
Fix: Finish the full wrist rotation to a clean palms-down position before starting to lower.
How to program it
- Three sets of 8 to 10 reps is a reasonable range, using a lighter weight than you'd pick for a standard preacher curl since the forearms fatigue faster than the biceps here.
- Two sessions a week suits this as an isolation accessory, especially if your forearms already get indirect work from rows or pull-ups earlier in your split.
- Put it toward the end of an arm or pull day, since pre-fatiguing your forearms here will cut into your grip on anything heavier you do afterward.
- Add weight only once the pronated lowering stays slow and controlled for every rep in the set; a faster drop at a heavier load trades away the exact benefit of this exercise.
Safety notes
- Keep the lowering controlled rather than letting the weight drop; losing control of a pronated grip partway down is how the wrist ends up taking a hard, awkward load.
- Stop just short of locking your elbows against the pad at the bottom to keep the joint, not just the muscle, from absorbing the stretch.
- Use a lighter weight than your usual preacher curl until you know how your forearms handle the slow descent.
Exercise profile
- Force
- Pull
- Mechanics
- Isolation
- Category
- Strength
Frequently asked questions
How many sets and reps of Zottman preacher curls should I do?
Three sets of 8 to 10 reps works well, with a weight noticeably lighter than your normal preacher curl since the pronated lowering tires your forearms faster.
What's the difference between a Zottman preacher curl and a regular preacher curl?
A regular preacher curl keeps your palms up for the whole rep and trains mostly biceps. The Zottman version adds a wrist flip at the top so you lower with your palms down, which shifts that half of the rep onto your forearms.
Can I do this without a preacher bench?
Yes, drop the bench and do a standing Zottman curl instead; you lose the strict elbow isolation but keep the same grip-switching pattern.
Why do my wrists hurt during the lowering phase?
That usually means the weight is dropping too fast once you rotate to palms-down, or your wrist is bending back instead of staying straight. Lighten the load and keep the wrist in line with your forearm through the whole descent.