Hack Squat

The hack squat machine provides a guided squat pattern on a 45-degree sled. The back support and foot-forward stance allow substantial quad loading with reduced lower back demand compared to free barbell squatting.

Beginner 💪 Quads Compound Squat
3–4
Sets
8–15
Reps
2 min
Rest
Compound
Type
🏋️ Machine
Hack Squat — start and finish positionsSTARTFINISH
Machine
Quads Beginner Compound
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Muscles Worked

Learn more in the Quads training guide →

Primary
Quads
Secondary
Glutes
Hamstrings
Highlighted muscles

How To Perform

  1. 1 Load the machine and position yourself on the back pad with shoulders under the pads.
  2. 2 Feet hip-width on the platform, toes slightly outward.
  3. 3 Unlock the safety and lower yourself by bending at the knees.
  4. 4 Descend until thighs are at or past parallel.
  5. 5 Drive back up to near-full extension.

Form Cues

  • ✓ Foot position affects muscle emphasis — higher feet emphasise hamstrings and glutes; lower feet emphasise quads.
  • ✓ Knees should track in the same line as the toes throughout.
  • ✓ Do not lock out completely — keep tension on the quads.

Common Mistakes

  • ✗ Butt winking off the pad at the bottom — this is acceptable to a degree in the machine.
  • ✗ Knees caving inward at the bottom.
  • ✗ Setting feet too high and losing the quad emphasis.
💡 Professor Splits Says:

Progressive overload is the engine of muscle growth. Track your weights and aim to add small increments weekly. For Hack Squat, this means gradually increasing load, volume (sets × reps), or decreasing rest periods over time.

Exercise Alternatives

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Where This Exercise Fits

FAQ

How many sets of Hack Squat should I do?▾
3–4 sets of 8–15 reps is a solid starting point. Adjust based on your training frequency and overall weekly volume for quads. Beginners should start with the lower end; advanced trainees can push toward the upper range.
What muscles does Hack Squat target?▾
Hack Squat primarily targets the Quads. Secondary muscles include Glutes, Hamstrings.
Is Hack Squat good for beginners?▾
Hack Squat is beginner-friendly. Focus on technique with lighter loads before adding weight.
How much rest between sets?▾
For Hack Squat, 2 min of rest between sets is recommended. Compound exercises require more recovery — longer rests (2–3 min) allow better performance on the next set.