Sit or position yourself on the lever rotary calf machine with the balls of your feet placed firmly on the platform and heels hanging off the edge. Keep your knees stable and core engaged. Push through the balls of your feet to extend your ankles and raise your heels as high as possible, squeezing your calves at the top. Slowly lower your heels below the platform until you feel a full stretch in the calves, then repeat in a controlled motion without bouncing.
Log your lever rotary calf sets in 1RM.fit and watch your estimated 1RM update automatically as you get stronger.