Lie or position yourself so your feet are on the foot platform of a Smith machine set low, with your back supported. Unlock the bar and press through your feet to extend your legs, then slowly bend your knees to lower the platform toward your body while keeping your back stable and core engaged. Press back up through your heels in a controlled motion.
Log your smith leg press sets in 1RM.fit and watch your estimated 1RM update automatically as you get stronger.