Machine Preacher Curl
- Secondary muscles
- Forearms
- Body part
- Upper Arms
- Position
- Standing
- Laterality
- Bilateral (both sides together)
- Category
- Strength
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A pad under your upper arms plus a fixed lever path removes the two main ways lifters cheat a curl: elbow drift and torso swing. Load changes with a pin, so it handles high-rep finishing work well, and newer lifters can groove the elbow-flexion pattern here before moving to free weights.
How to do the Machine Preacher Curl
- Adjust the seat height and position yourself on the leverage machine.
- Place your upper arms on the pad and grip the handles with an underhand grip.
- Keep your back straight and your elbows positioned on the pad.
- Exhale and curl your forearms towards your upper arms, contracting your biceps.
- Pause for a moment at the top of the movement, squeezing your biceps.
- Inhale and slowly lower the handles back to the starting position.
- Repeat for the desired number of repetitions.
Tip: Lower for three seconds and stop just short of locking out the elbow to keep the muscle under tension.
Muscles worked
Common mistakes
- Elbows drifting forward — as the elbows come up the front delt starts to lift the weight; pin the elbows to your sides and let only the forearm move.
- Swinging from the hips — a small rock backward on each rep means the weight is too heavy; drop it and curl from a dead stop.
- Cutting the bottom short — stopping with the elbow bent shortens the range where the biceps are stretched; lower until the arm is nearly straight.
- Wrists curling at the top — flexing the wrist toward you brings the forearm flexors in; keep the wrist neutral or slightly extended.
Sets, reps and where it fits
| Goal | Sets × reps | Rest |
|---|---|---|
| Muscle growth | 3–4 × 10–15 | 60–90 s |
| Endurance / finisher | 2–3 × 15–20 | 45 s |
| Strength | Not ideal — pick a compound lift for the same muscle | — |
Curls go at the end of a pull session or arm day, after the rows and pulldowns that also load the biceps. Superset them with triceps pushdowns on the same cable stack or triceps extensions with the same dumbbells.
Variations and alternatives
Similar exercises
Without machine
Frequently asked questions
What muscles does the Machine Preacher Curl work?
The Machine Preacher Curl primarily works the biceps. It also involves the forearms, which assist the movement and stabilise the joints.
Is the Machine Preacher Curl good for beginners?
Yes. The Machine Preacher Curl is rated beginner: it uses a machine and the movement is simple to learn. Start light, focus on the full range of motion and add load once every rep looks the same.
What can I do instead of the Machine Preacher Curl?
If you cannot do the Machine Preacher Curl, try the Leg Resisted Biceps Curl, the Side Lying Bodyweight Biceps Curl or the Barbell Preacher Curl. Each of them trains the biceps through a similar movement, so you can swap them in without changing the rest of the workout.
How many sets and reps should I do?
It depends on your goal. For the Machine Preacher Curl, a sensible starting point is muscle growth: 3–4 × 10–15 with 60–90 s rest; endurance / finisher: 2–3 × 15–20 with 45 s rest. Do it after your compound lifts. It is a finishing movement, not the main event.
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