Lie on your back on the sled/leg press machine with your upper body supported and your feet placed on the platform. Position only the balls of your feet on the lower edge of the platform, allowing your heels to hang off. Keep your knees slightly bent or mostly straight and brace your core for stability. Press the sled upward by extending your ankles and pushing through your toes until your calves are fully contracted. Pause briefly at the top, then slowly lower by flexing your ankles until you feel a deep stretch in your calves. Repeat for the desired reps with controlled movement and no bouncing.
Log your sled lying calf press sets in 1RM.fit and watch your estimated 1RM update automatically as you get stronger.