Hack Squat (Machine)
The hack squat is a machine-based squat performed on an angled platform with your back supported against a padded backrest. It isolates the quadriceps and glutes while reducing lower back strain compared to free-weight squats.
- Muscle group
- Legs
- Primary muscles
- quadriceps, glutes
- Equipment
- Machine

How to do the Hack Squat (Machine)
- Position yourself on the machine with your back flat against the pad and shoulders under the supports.
- Place your feet shoulder-width apart on the platform, positioned slightly forward of your hips.
- Release the safety handles and lower yourself by bending your knees until your thighs are roughly parallel to the platform.
- Push through your entire foot to extend your legs and return to the starting position.
- Complete your reps, then engage the safety handles before exiting the machine.
Form tips
- Keep your back and hips pressed firmly against the pad throughout the entire movement to maintain proper alignment.
- Drive through your midfoot and heel rather than letting your weight shift forward onto your toes.
- Control the descent for two to three seconds rather than dropping quickly to maintain tension on the muscles.
Common mistakes
- Allowing the knees to cave inward during the ascent reduces stability and places uneven stress on the knee joint.
- Placing feet too low on the platform shifts excessive load to the knees and limits range of motion.
- Locking out the knees completely at the top transfers tension from the muscles to the joints and reduces time under tension.
Sets and reps
For strength, perform 3 to 5 sets of 4 to 6 reps with heavier load, while hypertrophy typically uses 3 to 4 sets of 8 to 12 reps with moderate weight.
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Get the appFrequently asked questions
- Where should I place my feet on the hack squat platform?
- A shoulder-width stance in the middle to upper portion of the platform works for most lifters and emphasizes the quadriceps. Placing your feet higher and wider shifts more emphasis to the glutes and hamstrings.
- How deep should I go on the hack squat?
- Descend until your thighs are at least parallel to the platform, provided you can maintain a flat back against the pad. Going deeper can increase range of motion benefits, but only if you can do so without your hips lifting off the pad.
- Is the hack squat better than barbell squats for quads?
- The hack squat allows for greater quadriceps isolation because the back support removes lower back and core stability as limiting factors. Both exercises are effective, but the hack squat lets you focus purely on leg strength without technique being as much of a barrier.