Exercise Guide
How to do hack squat
Master the setup, range of motion, and tempo for safer, more effective reps.
Overview
The hack squat takes the guesswork out of leg day. By supporting your back against a padded sled, it removes the need for heavy core stabilization. This allows you to focus entirely on your quads. It is a powerful tool for building leg size because you can safely train until your muscles are completely fatigued without the risk of tipping over.
Why Use It
- Targets the quads with high precision due to the stable, fixed track.
- Protects the lower back by keeping the spine supported against a pad.
- Allows for deep range of motion that is often hard to reach with a barbell.
When to Use It
Place this in the middle of your leg workout. It works best after your main heavy lift or as your primary movement if you want to avoid loading your spine directly.
Stats
Instructions for Proper Form
Setup
- Shoulder Placement: Step into the machine and tuck your shoulders tightly under the pads.
- Foot Position: Place your feet in the middle of the platform, about hip-width apart.
- Unlock: Drive upward to take the weight and flip the safety handles out of the way.
Execution
- The Descent: Lower yourself slowly by bending at the knees and hips. Keep your entire back pressed into the padding.
Pro Tip: Imagine you are trying to leave a permanent dent in the back pad with your spine.
- The Drive: Once you reach the bottom, push through your mid-foot to return to the start. Stop just before your knees lock out.
Coaching Cues
- Drive the floor away
- Keep your heels glued down
- Stay heavy in the seat
Common Mistakes
- Heels Lifting: The heels pop off the plate at the bottom, shifting stress into the knee joint.
- Butt Wink: The tailbone curls away from the pad at the bottom, straining the lower back.
- Knee Cave: The knees collapse inward during the drive up, which can lead to joint pain.
How to Fix It
- Heels Lifting: Move your feet slightly higher on the platform to allow for better ankle range.
- Butt Wink: Cut your depth slightly and focus on keeping your abs braced against the pad.
- Knee Cave: Think about 'tearing the floor apart' with your feet to keep your knees tracking over your toes.
Mistakes by Level
Beginner
- Cutting the range of motion too short.
- Forgetting to lock the safeties.
Intermediate
- Bouncing out of the bottom position.
- Locking knees aggressively at the top.
Advanced
- Allowing the head to crane forward off the pad.
Mechanics
Use these setup and execution anchors to keep the rep organized, repeatable, and easier to progress.
Movement Pattern
Squat
Body Position
Machine Standing
Load Style
Machine Guided
Muscles Worked
Primary
- Quads
Secondary
- Glutes
- Hamstrings
Stabilizers
- Calves
Setup Requirements
- Step into the machine and wedge your shoulders firmly under the pads.
- Place your feet hip-width apart on the platform.
- Stand up to release the safety handles.
Form Checklist
- Is my lower back pressed firmly into the pad?
- Are my heels staying in contact with the platform?
- Are my knees tracking in the same direction as my toes?
Range of Motion
Lower the sled until your thighs are at least parallel to the footplate, or as deep as you can go without your tailbone lifting off the pad.
Breathing Pattern
Take a big breath in as you lower the weight; blow the air out as you drive back up.
Tempo Guidance
Lower for 3 seconds, pause for 1 second at the bottom, and drive up smoothly.
Caution Notes
- Stop the descent if you feel your hips starting to curl forward off the back pad.
Programming
Treat these guidelines as practical programming defaults, then scale load, volume, and frequency to match the rest of the training week.
Best For
- Building quad mass.
- Training legs with lower back sensitivity.
- High-intensity sets near failure.
Goal Tags
Rep Ranges
- 8-12 reps for muscle growth.
- 12-20 reps for leg endurance and metabolic burn.
Set Guidance
3-4 sets.
Rest Guidance
2 minutes between sets.
Frequency
1-2 times per week.
Pairings
- Pair with leg curls to balance the front and back of the legs.
Audience Notes
- Excellent for lifters who want to maximize leg growth without the technical demands of a barbell.
Substitution Targets
- Leg Press
- V-Squat
- Smith Machine Squat
Variations
Use progressions to increase difficulty when you master the movement, and regressions if you struggle with proper form or face mobility limitations.
Regressions
Leg Press
Provides similar stability with even less demand on the upper body.
Best for: Beginners.
Progressions
1.5 Rep Hack Squats
Adds extra time under tension at the most difficult part of the lift.
Best for: Advanced hypertrophy.
FAQ
Common Questions
Where should I put my feet?
Lower on the platform hits the quads more; higher on the platform involves more of the glutes and hamstrings.
Alternatives
Start with the closest related options, then browse fallback alternatives that keep the same primary training focus.