Position a step (or small block) directly under the barbell, and load the bar onto your shoulders. If performing this in a power rack with a barbell, the bar will simply slide up and down the rack as you perform reps.
Lower your heels to let your calves stretch, keeping your toes and the balls of your feet on the step.
Drive yourself up and squeeze your calves.
… Okay, most people stop here, believing it’s as far as they can go. BUT IT’S NOT! Instead, when you drive up I want you to focus on pushing your big toe into the step HARD. You will unlock more leverage and see a much greater contraction in both calves (see video).