Sit on the lever preacher curl machine and adjust the seat so your upper arms rest comfortably on the pad. Grip the handles with palms facing up and start with your arms nearly fully extended. Keeping your upper arms fixed against the pad, curl the handles toward your shoulders by bending your elbows. Squeeze your biceps at the top, then slowly lower the handles back down in a controlled motion without locking your elbows. Keep your back straight and avoid using momentum throughout the movement.
Log your lever preacher curl (version 2) sets in 1RM.fit and watch your estimated 1RM update automatically as you get stronger.