ProgreviaLeg press: proper form, muscles worked and common mistakes
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How to do it
Feet hip-width on the platform and lower back flat against the pad. Lower to about 90° without letting the pelvis lift and press through the heels without snapping the knees straight.
Muscles worked
Main muscle: quads. Also worked: glutes and hamstrings. When it plans weekly volume, the generator counts each set of this exercise as one full set for quads and half a set for each secondary muscle (what is known as fractional counting).
Leg press vs. hack squat: where your body is supported
On the leg press you're reclined and pushing a platform away; in the hack squat you're standing on it, tilted back against the pad, in a squat position. That difference matters: the leg press minimizes the demand on balance and your trunk, and lets you move heavy loads without your back being the first thing to give out. The hack keeps more of a squat feel and a path closer to vertical. Foot placement also decides a lot on the press: higher and wider shifts the work toward the glutes and hamstrings; lower and closer together, toward the quads.
It's a great choice if you're starting out, if you want leg volume without much lower-back fatigue, or to finish a session after a squat or a deadlift. It works well in ranges of 8 to 15 reps. Add weight only when your depth is equally deep on every set: a shortened press with a big load misleads you about what you're really lifting.
Before loading, learn how the safeties on your machine release, since they vary a lot between models. Grip the handles, don't push your knees with your hands, and keep your head against the backrest.
Technical sheet
- Movement pattern
- Squat
- Minimum level
- Beginner
- Technical demand
- Basic
- Fatigue it generates
- High (1.2 out of 2.2)
- Risk if technique breaks down
- Low
These are the values the generator uses to decide where the exercise goes within the session.
Recommended sets and reps
As a compound lift, it fits in 3–5 sets of 5–12 reps leaving 1–3 reps in reserve (RIR). Prioritize it at the start of the session, when you're fresh.
Common mistakes to avoid
- Going so deep that your pelvis tucks and your lower back peels off the pad: the useful range ends just before that.
- Not adjusting the seat and pads to your body: your joint should line up with the machine's pivot.
- Using too much weight at the cost of technique and full range of motion.
What the research says
This is a multi-joint lift, and with these the rep range matters less than it seems: Schoenfeld and colleagues (2021) concluded that muscle growth is similar with heavy or moderate loads as long as sets end close to failure, while maximal strength improves more with heavy loads.
On how hard to push: the meta-analysis by Refalo and colleagues (2023) found no clear advantage in going to failure over stopping just short of it. That is why the generator programs it with reps in reserve (RIR) instead of asking for failure on every set.
- Schoenfeld BJ, Grgic J, Van Every DW, Plotkin DL. Loading recommendations for muscle strength, hypertrophy, and local endurance: a re-examination of the repetition continuum. Sports. 2021;9(2):32.
- Refalo MC, Helms ER, Trexler ET, Hamilton DL, Fyfe JJ. Influence of resistance training proximity-to-failure on skeletal muscle hypertrophy: a systematic review with meta-analysis. Sports Medicine. 2023;53(3):649-665.
How Leg press compares with other quads exercises
Of the 16 quads exercises in the catalogue, ranked from least to most fatiguing by the values the generator uses, Leg press is number 7 (tied with one other).
It sits in the middle of its group: it works as the day's main exercise or as a second or third one.
With different equipment, the same movement pattern offers 12 alternatives, such as Goblet squat, Dumbbell step-up and Static lunge.
| Exercise | Equipment | Fatigue | Technique |
|---|---|---|---|
| Goblet squat | dumbbells | Moderate (0.8 out of 2.2) | Basic |
| Dumbbell step-up | dumbbells | Moderate (0.9 out of 2.2) | Basic |
| Static lunge | bodyweight | Moderate (0.9 out of 2.2) | Basic |
| Banded squat | resistance band | Moderate (1 out of 2.2) | Basic |
| Leg press | machine | High (1.2 out of 2.2) | Basic |
| Dumbbell lunges | dumbbells | High (1.2 out of 2.2) | Basic |
| Box jump | bodyweight | High (1.3 out of 2.2) | Needs coaching |
| Cyclist squat | dumbbells | High (1.3 out of 2.2) | Needs coaching |
On a machine. In the meta-analysis by Haugen et al. (2023), with thirteen studies and 1,016 participants, there were no significant differences in muscle growth between training on machines and with free weights.
- Haugen ME, Vårvik FT, Larsen S, Haugen AS, van den Tillaar R, Bjørnsen T. Effect of free-weight vs. machine-based strength training on maximal strength, hypertrophy and jump performance: a systematic review and meta-analysis. BMC Sports Science, Medicine and Rehabilitation. 2023;15(1):103.
Related guide
Leg press: technique, foot position and the squat
Alternative exercises
More squat exercises
Add it to your routine
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Frequently asked questions
What muscles does Leg press work?
Leg press mainly works the quads muscle group, plus synergist and stabilizer muscles depending on the variation.
How many sets of Leg press should I do?
Between 3 and 5 sets per session, adjusting the total weekly volume for quads to your level (about 10–20 sets per muscle per week).
Can the leg press replace squats?
It works similar muscles, but it isn't the same: on the press your trunk doesn't have to hold anything up and balance doesn't count. It's a fine alternative when you can't or don't want to load a bar, or a good volume add-on. If your goal is the full squat pattern, keep some standing lift in the mix as well.
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