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How to do the Sled Full Hack Squat

LegsQuadsMachineBeginner

The sled hack squat machine places you in a mechanically precise position that drives serious quad development with less spinal load than a barbell squat. Master this movement and you will build the kind of thick, defined thighs that make every lower-body session count.

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Muscles worked

Primary
Quadriceps
Secondary
GlutesHamstringsCalves

Step-by-step

  1. Set your feet shoulder-width apart on the platform with toes angled out 15 to 30 degrees, then rest your back flat against the padded sled and unhook the safety handles.
  2. Breathe in and descend by bending at the knees, keeping your heels firmly planted and your lower back pressed into the pad throughout the entire descent.
  3. Lower until your thighs reach at least parallel to the platform, pause briefly, then drive through your full foot to press the sled back to the start position.
  4. Lock out by squeezing your quads hard at the top, re-hook the safety handles only when you have completed your final rep.

Common mistakes

  • Letting the heels rise off the platform, which shifts stress to the knees and reduces quad activation, so consciously root your heels down before every rep.
  • Placing the feet too high on the platform, which turns the movement into a glute exercise rather than a quad-dominant one, so keep feet at mid-to-low platform height for maximum quad stretch.
  • Bouncing out of the bottom by using momentum rather than muscle, which robs you of the most productive portion of the lift, so pause for a full second at the bottom before driving up.

Pro tip — On every rep, actively push your knees out in line with your third toe as you press up. This external rotation cue prevents valgus collapse and fully engages the outer quad sweep, a detail most beginners never learn until much later.

Sets & reps by goal

Build muscle3–4 sets × 6–10 reps
Get stronger4–5 sets × 3–6 reps
Lose fat / tone3 sets × 10–12 reps

Rest: 2–3 min between sets (60–90s on lighter days).

More Legs exercises

Barbell Bench Front SquatBarbell Bench Front SquatBarbell Front Chest SquatBarbell Front Chest SquatBarbell Full SquatBarbell Full SquatBarbell Good MorningBarbell Good MorningBarbell LungeBarbell LungeBarbell One Leg SquatBarbell One Leg Squat
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