Hack Squat
The hack squat isolates the quadriceps on a machine without spinal loading, building the heavy quad strength HYROX sled pushes demand.
Definition
The hack squat is a squat-pattern exercise performed on a hack squat machine where the athlete stands on a platform with the back against an angled pad and squats by bending the knees. The machine removes balance demands and isolates the quadriceps, allowing heavier quad loading than free-weight squats. It builds the quad strength HYROX® athletes need for sled pushes and wall balls.
Technique & Form
- Starting position - Position the shoulders under the pads, feet shoulder-width apart on the platform. Release the safety handles.
- Descent - Bend the knees to lower the sled until thighs reach parallel or below. Keep the back flat against the pad.
- Drive phase - Press through the mid-foot to extend the knees and return to the top.
- Breathing - Inhale as you descend; exhale as you drive up.
- Tempo - 2-3 seconds down, 1 second up.
Muscles Worked
- Primary movers: Quadriceps, gluteus maximus
- Stabilizers: Hamstrings, calves (minimal core due to machine support)
Common Mistakes
- Heels lifting - Fix: place feet slightly higher on the platform.
- Knees caving - Fix: push the knees out actively through the full range.
Benefits
- Heavy quad loading without spinal compression.
- Eliminates balance as a limiting factor, allowing pure leg strength development.
- Useful for building quad size and endurance.
HYROX® Context
The hack squat builds the quad strength that powers the Sled Push station. While less functional than front squats, the machine allows athletes to load the quads heavily without the core fatigue that limits free-weight squats. Program 3-4 sets of 8-12 reps as a secondary leg exercise after front squats or as a primary quad exercise when back or core fatigue limits free-weight work.
Variations & Alternatives
- Front Squat - Free-weight squat with core demand.
- Dumbbell Front Squat - Dumbbell version for moderate loading.
- Dumbbell Goblet Squat - Beginner-friendly quad builder.
FAQ
Is the hack squat good for HYROX®? As a supplement to free-weight squats, yes. It builds quad strength without spinal loading. Do not use it as your only squat - free-weight squats build the core stability HYROX® demands.
How heavy should I go? Moderate to heavy - 60-100 kg on the machine for most athletes. The machine allows heavier loading than dumbbell squats.
Build quad strength and track your squat variations with ROXBASE.
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