What is the Machine Preacher Curl?
The Machine Preacher Curl is a seated curl where your upper arms rest on an angled pad while you curl machine handles toward your shoulders. It mainly trains the biceps and brachialis. The pad and the machine path keep the work in your arms.
Quick facts
- Level: Beginner
- Equipment: Preacher curl machine
- Movement pattern: Elbow flexion
- Force: Pull
- Type: Isolation
- Sides: Both arms together
Muscles worked
Primary muscles
- Biceps brachii
- Brachialis
Secondary muscles
- Brachioradialis (forearm)
How to do the Machine Preacher Curl
- Setup: Adjust the seat so your armpits rest at the top of the preacher pad.
- Setup: Place the backs of your upper arms flat on the pad. Grip the handles with an underhand grip.
- Start: Brace your core. Start with your arms almost straight.
- Move: Curl the handles up toward your shoulders. Keep your upper arms on the pad.
- Move: Squeeze your biceps at the top.
- Return: Lower the handles slowly until your arms are almost straight again.
Coaching cues
- Keep your arms glued to the pad.
- Curl smoothly, no jerking.
- Control the way down.
Common mistakes
- Lifting the elbows off the pad. Keep the backs of your arms on the pad. Lower the weight if your elbows rise.
- Leaning back to finish the rep. Keep your chest against the pad and your torso still.
- Letting the weight drop at the bottom. Lower slowly and stop just short of locking your elbows.
- Seat set too high or too low. Reset the seat so your armpits sit at the top edge of the pad.
Easier and harder options
- Harder: Spider Biceps Curl. You hold free dumbbells with no machine path, and the bench still blocks body swing.
Training focus and energy demand
This curl is mainly used to build biceps muscle size and strength. The fixed path and pad make it easy to push close to effort with good form.
No single energy system powers this exercise. The systems overlap, and the balance shifts with how heavy, how fast and how long you work. Brief, hard efforts rely more on quick energy stored in the muscle. Longer sets with little rest lean more on aerobic energy. Hard efforts that last from several seconds to a few minutes also rely heavily on energy your muscles make quickly from carbohydrate.
FAQs
Should I fully straighten my arms at the bottom?
Lower until your arms are almost straight. Stop just short of a hard lockout and keep the weight moving under control.
How is this different from a free-weight preacher curl?
The machine sets the path for you and keeps tension on the handles. With a bar or dumbbell, you control the path, and the load feels lighter near the top.