Hack Squat vs Leg Press
The short answer. Both are machine squats for the quads and glutes with your back supported. On the hack squat your body moves on a sled with the load on your shoulders, and on the leg press you sit still and push the platform away. Pick the hack squat for a squat-like feel, and the leg press for the simplest setup and the most freedom in foot position.
Differences at a glance
| Hack Squat | Leg Press | |
|---|---|---|
| Main muscles | quads, glutes | quads, glutes |
| Movement pattern | Squat | Squat |
| Type | Compound (several joints) | Compound (several joints) |
| Equipment (differs) | hack squat | leg press |
| Level | Beginner | Beginner |
| Joint stress areas | knee | knee |
| What moves (differs) | Your body, on a sled, with pads on your shoulders | The platform, while you stay in the seat |
| Body position (differs) | Upright, close to a standing squat | Reclined, with your hips flexed at the start |
| Load on your shoulders (differs) | Yes, through the shoulder pads | None, the load goes through your feet only |
| Best for (differs) | Quad training that carries over to the squat | Easy, heavy leg work for beginners and high-rep sets |
Muscles worked
Hack Squat
- Quads (main muscle)
- Glutes (main muscle)
- Hamstrings (also works)
Leg Press
- Quads (main muscle)
- Glutes (main muscle)
- Hamstrings (also works)
- Calves (also works)
Which one should you do?
Choose the hack squat if
- You want a machine that feels close to a barbell squat.
- You want a lot of quad work with an upright torso.
- You plan to move on to free-weight squats later.
Choose the leg press if
- You are new to leg training and want the simplest machine to learn.
- You do not want any load on your shoulders or spine from above.
- You want to change foot position to shift the work between quads and glutes.
- Your gym has no hack squat machine.
Can you do both?
You can use both in one week. Do the hack squat early in one leg session as the main squat, and use the leg press on another day for higher-rep work. Because both hit the quads hard, count them both in your weekly sets for the legs.
How the form differs
- On the hack squat you stand with your back and shoulders on the pads. On the leg press you sit and your back stays on the seat pad.
- On the hack squat you lower your body until your thighs are about parallel to the platform. On the leg press you lower the sled toward you until your knees reach about 90 degrees.
- Hack squat cues ask you to release the safety handles and stand tall first. Leg press cues ask you to keep your lower back flat on the pad at the bottom.
- In both, push through your whole foot and do not lock your knees hard at the top.
Questions
Is the hack squat harder than the leg press?
Most people find it harder. Your body moves with the load, your shoulders carry the pads, and the upright position puts a lot of work on the quads. You will usually use less weight on the hack squat than on the leg press.
Which is better for the quads?
Both train the quads well. The hack squat keeps you upright like a squat, which many lifters feel more in the quads. Foot position on either machine changes the share of quad and glute work.
Does foot position matter on the leg press?
Yes. In a study of the leg press, a wide stance with the feet high on the platform gave more hamstring activity than a narrow stance at the same height. Feet lower on the platform bend the knees more.
Can I do the hack squat instead of squats?
Yes, for leg strength and size. The machine removes the balance and bracing demand of a free bar, so it trains your torso less.