Pendulum Squat
The pendulum squat is a machine squat: with your back against a pad and your shoulders under pads, you ride a weighted swing arm down into a deep squat and drive it back up. It works the quads above all, with the glutes and adductors contributing more as depth grows, and the supported position lets the legs be loaded heavily without a balance demand.
Also called: Pendulum Squat Machine, Arc Squat · Equipment: machine · Pattern: squat
Step by step
- Adjust the shoulder pads so you can stand tall under them with your back flat against the back pad. Place your feet on the plate about hip- to shoulder-width apart, flat from heel to toe.
- Stand up to take the weight, release the safety handles, then take a breath and brace.
- Bend your knees and hips together to ride the carriage down under control, keeping your heels flat and your knees tracking in line with your toes.
- Descend as deep as you can while your pelvis and back stay against the pad.
- Push through your whole foot to drive the carriage back up to a tall finish, with your knees just short of locking.
- After the last rep, return the safety handles to the locked position before stepping off.
- Heels flat, push through the whole foot
- Knees track over your toes
- Back and hips stay on the pad
- Smooth turnaround at the bottom
- Finish tall, knees soft
In VALDA, these cues are one tap away on the exercise while you train.
What it trains
| Muscle | Role | Evidence |
|---|---|---|
| Quadriceps: vastus lateralis | Prime mover | B |
| Quadriceps: vastus medialis | Prime mover | B |
| Quadriceps: vastus intermedius | Prime mover | C |
| Quadriceps: rectus femoris | Secondary | C |
| Gluteus maximus | Secondary | C |
| Adductors | Secondary | C |
| Hamstrings | Stabiliser | C |
| Erector spinae | Stabiliser | C |
Evidence grades: A = strong research base · B = good · C = limited · D = coaching consensus.
What goes wrong, and the fix
Heels lifting
Fix: Set your feet slightly higher on the plate and press through your mid-foot.
Pelvis tucking at the bottom
Fix: Go only as deep as your pelvis stays on the pad, or widen your stance.
Bouncing out of the bottom
Fix: Control the descent and make a smooth turnaround, with a brief pause if needed.
Locking out hard between reps
Fix: Finish tall with your knees just short of locking and go into the next rep.
Knees caving in
Fix: Keep your knees pushed out in line with your toes throughout.
Too much depth and load too soon
Fix: Build depth and load gradually over several weeks.
What the research says
Muscle growth · first choiceGeneral fitness · first choiceStrengthRehab & prehabEnduranceFat loss & conditioning
- Load and reps — Research finds muscle growth is similar across a wide range of loads when sets are taken close to failure. A common approach is 8–15 reps for size and 5–8 reps for heavier work.
- Effort — Studies show sets that finish a few reps short of failure capture most of the size benefit. The back support and safety catches make sets close to failure practical on this machine.
- Depth — In a 10-week training study, full-depth squats grew the glutes and adductors more than half squats, while quad growth was similar at both depths.
- Machines and free weights — A meta-analysis found machine and free-weight training give similar muscle growth, with strength gains specific to the equipment trained.
- Volume — Research links more weekly sets for a muscle to more growth, with diminishing returns. Two to four hard sets, one to three times a week, is a common range.
Swap it mid-workout
With VALDA Pro, FLEX offers alternatives like these when you swap an exercise mid-workout.
Log the pendulum squat in VALDA, with these cues one tap away while you train and your history for it in one place.
General information about exercise technique, not medical advice. If you have an injury or a health condition, your healthcare provider is the right person to ask.