Exercise guide · evidence-graded

Preacher Curl Machine

The machine preacher curl is a seated biceps exercise in which you curl a machine's handles with the backs of your upper arms resting on an angled pad. The pad and the machine's fixed path keep the upper arms still, so the biceps and brachialis do the work with little balance or technique demand.

Also called: Machine Preacher Curl, Selectorised Preacher Curl, Biceps Curl Machine, Seated Machine Curl · Equipment: machine · Pattern: pull

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How to do it

Step by step

Set the seat height so the top of the pad sits snugly under your armpits and your elbows line up with the machine's pivot point.
Sit down, rest the backs of your upper arms flat on the pad and take the handles with your palms facing up.
Start with your arms almost straight, chest against the top of the pad and feet flat on the floor.
Curl the handles up by bending at the elbows, keeping your upper arms flat on the pad.
Finish when your forearms are close to vertical and pause for a moment.
Let the handles travel back under control until your arms are almost straight, without letting the weight stack touch down between reps.
After the last rep, return the handles to the start position and let the weight settle before releasing them.

Coaching cues

Elbows in line with the machine's pivot
Upper arms flat on the pad
Curl until your forearms are near vertical
Control the handles back to almost straight
Keep the stack from touching down

In VALDA, these cues are one tap away on the exercise while you train.

Muscles worked

What it trains

Muscle	Role	Evidence
Biceps brachii: short head	Prime mover	C
Biceps brachii: long head	Prime mover	C
Brachialis	Prime mover	C
Brachioradialis	Secondary	D
Forearm flexors	Stabiliser	D

Evidence grades: A = strong research base · B = good · C = limited · D = coaching consensus.

Common faults

What goes wrong, and the fix

Seat set too high or too low

Fix: Set the seat so your elbows line up with the pivot and the pad meets your armpits.

Elbows lifting off the pad

Fix: Keep the backs of your upper arms pressed into the pad the whole rep.

Letting the stack drop

Fix: Take two seconds to let the handles back down.

Cutting the bottom short

Fix: Let your arms return to almost straight before the next curl.

Leaning back to heave the weight

Fix: Keep your chest against the pad and move only at the elbows.

Programming

What the research says

Rehab & prehab · first choiceGeneral fitness · first choiceEndurance · first choiceMuscle growth

Machines and free weights — A meta-analysis found machine and free-weight training give similar muscle growth, while strength gains are specific to the tool trained.
Regional growth — An eight-week trial found preacher curls produced more growth near the elbow, and incline curls more growth near the shoulder.
Load and effort — Research finds muscle growth is similar across a wide range of loads when sets are taken close to failure. Studies show finishing a few reps short of failure captures most of the benefit.
Volume — Research links more weekly sets for a muscle to more growth, with diminishing returns.
Drop sets — The pin-loaded stack makes drop sets and high-rep sets quick to run. There is no research specific to the machine preacher curl on this.

Alternatives · VALDA FLEX

Swap it mid-workout

With VALDA Pro, FLEX offers alternatives like these when you swap an exercise mid-workout.

Log the preacher curl machine in VALDA, with these cues one tap away while you train and your history for it in one place.

General information about exercise technique, not medical advice. If you have an injury or a health condition, your healthcare provider is the right person to ask.