Lever Seated One Leg Squat
- Target muscle
- —
- Equipment
- Leverage machine
- Body part
- Thighs
- Type
- Strength
The Lever Seated One Leg Squat is a unilateral thigh exercise performed on a leverage machine that targets the quadriceps of one leg at a time. Working each leg independently exposes and corrects strength imbalances that bilateral pressing movements can mask. It is well suited for building single-leg quad strength and stability with controlled machine resistance.
How to do the Lever Seated One Leg Squat
- 1Set the leverage machine seat and backrest so that your knee aligns with the machine's pivot point when seated.
- 2Sit upright with your back flat against the pad and grip the handles at your sides for stability.
- 3Place the foot of your working leg on the platform at about hip width, toes pointing slightly outward.
- 4Keep the non-working leg off the platform or resting lightly to the side — it should bear no load.
- 5Brace your core and press through the heel of your working foot to extend your knee and push the platform away.
- 6Extend until your knee is nearly straight but not locked out, keeping tension on the quadriceps.
- 7Reverse the movement slowly, bending your knee and lowering the platform under control.
- 8Stop when your knee reaches roughly 90 degrees or the depth the machine allows without your lower back rounding.
- 9Complete all reps on one leg before switching to the other side.
Form tips
- Drive through your heel rather than the ball of your foot to keep the load on the quadriceps rather than shifting stress to the knee.
- Move at a 2-second lowering tempo — the eccentric phase builds more quad strength than rushing back up.
- Keep your hips even on the seat throughout the set; avoid tilting toward the working side to recruit the hip flexor.
- Start with a lighter load than you would use for the two-leg version — single-leg strength is typically 55–65% of your bilateral total.
- Match the rep count and load exactly between legs each session to prevent reinforcing an existing imbalance.
Common mistakes
- Letting the knee cave inward during the press, which shifts load off the quadriceps and places stress on the medial knee structures.
- Locking out hard at the top of every rep, which shifts compression onto the knee joint rather than keeping tension on the muscle.
- Using the non-working leg to assist the push, defeating the purpose of the unilateral format and masking the weaker side.
- Allowing the lower back to round at the bottom of the range, which indicates the seat is set too low or the load is too heavy.
- Rushing the lowering phase, which reduces time under tension and limits the quadriceps stimulus.
Frequently asked questions
What muscles does the Lever Seated One Leg Squat work?
It primarily works the quadriceps of the working leg — the four muscles on the front of the thigh that extend the knee. The glutes and hamstrings assist to a lesser degree depending on the seat angle and range of motion used.
How is this different from a regular seated leg press?
The key difference is unilateral loading: only one leg drives the movement at a time. This prevents your stronger leg from compensating for the weaker one, making it more effective for identifying and correcting left-right strength imbalances.
How much weight should I use compared to my two-leg machine squat?
Start at roughly 50–60% of the load you use for the two-leg version. Your single-leg quad strength is lower, and it takes several sessions to learn the motor pattern for the unilateral movement.
Can I use this exercise to rehab a knee or correct a muscle imbalance?
The machine's guided path and the ability to control load precisely make it a common choice in rehabilitation contexts, but always work within a pain-free range and consult a physiotherapist if you are managing an injury.
How many sets and reps are appropriate for this exercise?
Three to four sets of 8–15 reps per leg works well for most training goals. Keep rest between legs short (30–45 seconds) to maintain session efficiency while still allowing enough recovery for the next set.
