Hack Squat

Muscles Worked

How to Perform

1. 1

   Setup: Position yourself on the hack squat machine with your back and shoulders firmly against the pad. Place feet shoulder-width apart in the middle of the platform, toes slightly pointed out. Your head should stay neutral against the pad throughout.

2. 2

   Starting Position: Release the safety handles and hold the side grips firmly. Start with legs nearly extended but not locked out. Take a deep breath and brace your core. Keep your chest proud and shoulders back against the pad.

3. 3

   Descend: Lower the weight in a controlled manner by bending your knees and hips. Keep your back flat against the pad and maintain tension in your quads. Descend until your thighs are parallel to the platform or slightly below, achieving at least 90 degrees of knee flexion.

4. 4

   Drive Up: Push through your entire foot, emphasizing your heels, to drive the platform back up. Extend your knees and hips simultaneously while keeping constant tension in your quads. Exhale as you push through the concentric portion.

5. 5

   Top Position: Return to the starting position with legs nearly extended but maintain a soft bend in your knees—never lock out completely as this removes tension from the quads and stresses the joints. Reset your breath and repeat for desired reps.

Common Mistakes

• Heels Lifting Off Platform

  Allowing your heels to rise shifts the load to your toes and reduces quad engagement. Drive through your heels and keep your entire foot flat on the platform throughout the movement.

• Knees Caving Inward

  Valgus knee collapse puts dangerous stress on the knee joint. Actively push your knees out in line with your toes throughout the entire range of motion to protect your joints.

• Back Coming Off Pad

  Letting your lower back arch away from the pad creates dangerous spinal stress. Keep your entire back pressed firmly against the pad and maintain a neutral spine throughout.

• Incomplete Range of Motion

  Only going halfway down limits quad development. Descend until thighs are at least parallel to the platform for full muscle activation, unless you have mobility restrictions.

Pro Tips

• Foot Placement Variations

  Higher foot placement emphasizes glutes and hamstrings, while lower placement targets the quads more intensely. A wider stance activates adductors and inner quads. Experiment to find what works for your goals.

• Control the Eccentric

  Take 2-3 seconds to lower the weight. This controlled eccentric phase maximizes time under tension and creates more muscle damage for growth. Don't let gravity do the work—your quads should resist every inch.

• Pause at the Bottom

  Adding a 1-2 second pause at the bottom eliminates momentum and forces your quads to work harder. This technique builds explosive strength and mental toughness while improving your sticking points.

• Mind-Muscle Connection

  Focus on feeling your quads stretch at the bottom and contract at the top. Think about pushing the platform away rather than just extending your legs. This mental cue dramatically improves quad activation.

Variations

Alternatives

Related Leg Exercises