Machine Preacher Curl
- Beginner
- Machine
The machine preacher curl seats you with the upper arms flat on an angled pad and the hands on handles that follow a fixed arc. The pad puts the shoulder into slight flexion, which shortens the biceps long head and shifts more of the demand onto the short head and the brachialis, and it removes any chance of swinging the load up with the hips. A ten week trial comparing preacher curls against a shoulder extended cable curl found similar biceps and brachialis growth from both, so the preacher position is best treated as a strictness choice rather than a growth advantage.
How to do the Machine Preacher Curl
- Set the seat height so your armpits rest against the top of the pad.
- Sit with your chest against the support and your feet flat on the floor.
- Take the handles with an underhand grip and lay your upper arms flat on the pad.
- Straighten your arms to the start position without fully locking the elbows.
- Curl the handles toward your shoulders and squeeze at the top.
- Lower under control back to the stretched position and repeat.
Muscles worked
- Primary:
- Biceps
- Secondary:
- Forearms
Why train it
- The pad removes momentum, so the biceps take the load at every rep speed.
- A fixed path is quick to teach and easy to load in small steps.
- Supported arms let you train close to failure without the torso compensating.
Common mistakes
- Sliding the elbows up the pad, which shortens the range the biceps actually work.
- Lifting the chest off the support to start the rep, which brings the back into an arm exercise.
- Snapping the arms straight at the bottom, which loads the elbow in a stretched position.
- Setting the seat too low, so the shoulders shrug up and the pad digs into the arms.
Frequently asked questions
What muscles does the Machine Preacher Curl work?
The Machine Preacher Curl trains the biceps as the main target. Expect the forearms to take some of the load as well.
What equipment do I need for the Machine Preacher Curl?
Only a machine. Nothing beyond that is required to run the movement the way it is described above.
Is the Machine Preacher Curl suitable for beginners?
Yes. The Machine Preacher Curl is rated beginner, and the machine holds the path for you, so there is little to get wrong once the seat and the pin are set.
Can I do the Machine Preacher Curl at home?
Only if your home setup runs to a machine. Most do not, so this is usually a gym movement. The alternatives below cover the same muscles with kit you are more likely to have.
How many sets and reps of the Machine Preacher Curl should I do?
Three to four sets of 10 to 15 reps. Isolation work responds to reps and a controlled tempo rather than load, so stop each set a rep or two short of failure and keep the weight honest.
What are good alternatives to the Machine Preacher Curl?
Cable Bar Curl, Close-Grip Barbell Curl, and Cross-Body Hammer Curl train the same primary muscles as the Machine Preacher Curl. Pick whichever one matches the equipment in front of you.