Sit at a preacher curl station with your upper arms supported on the angled pad and grasp the lever handles or bar. Keep your torso stable and elbows fixed against the pad. Curl the lever upward by flexing your elbows, squeezing your biceps at the top of the movement. Slowly lower the weight back to the start with control, maintaining tension on the biceps throughout the motion.
Log your lever preacher curl sets in 1RM.fit and watch your estimated 1RM update automatically as you get stronger.