The machine preacher curl, a variation of the standard preacher curl, is an upper arm workout performed on a machine. It hits muscles like the brachioradialis, brachialis, and wrist flexors and should be performed with an incredibly strict form. Otherwise, it will not be useful for improving your stability.
Machine Preacher Curl Benefits
The machine preacher curl helps isolate the muscles of your upper arms while the movement totally focuses on the bicep muscles you intend to develop.
Since the exercise requires you to rest your arms on the machine, it removes shoulder flexion from the lift.
It not just strengthens your arms but also reduces the risks of soreness and injuries of your elbow joints.