Stand on the sled platform with your shoulders against the pads and place your feet in a closer-than-shoulder-width stance. Unlock the sled and slowly lower your body by bending your knees and hips while keeping your chest upright and core braced. Descend under control until your thighs reach at least parallel, keeping your knees tracking over your toes. Push through your heels to extend your legs and return to the starting position without locking out your knees. Repeat for the desired reps while maintaining steady tension and control throughout the movement.
Log your sled closer hack squat sets in 1RM.fit and watch your estimated 1RM update automatically as you get stronger.