Hack One-Leg Calf Raise
The calf raise on one leg in a hack squat machine, shoulders under the pads; the sled carries the load and the free leg stays off the platform.
How to do it
Setup
Back against the pad, shoulders under the pads, the ball of one foot on the platform's lower edge, the other leg bent away.
Steps
- Release the safety handles and straighten the working leg.
- Rise onto the ball of the foot as far as the ankle allows.
- Lower the heel below the edge; finish the set, then switch legs.
Common mistakes
Bending the knee to push the sled: the knee stays straight, the ankle does the work. Foot too high on the platform: only the ball of the foot on the edge. Switching legs with the safeties open: lock them first.
Breathing
Exhale rising, inhale lowering.




