The pendulum squat is a machine squat. You stand on a footplate with your back and shoulders against a pad; the pad sits on a lever arm that pivots from behind the machine and carries the plates, so it swings through an arc as you squat instead of sliding along a rail. The arc gives the name.
Nobody is credited with inventing or naming it; a web search on October 7, 2026 found no inventor. Brolic lists it as Pendulum Squat (Machine), with “Machine Pendulum Squat” as an alias, and logs it as an ordinary two-sided exercise.
Muscles worked
Brolic tags the quadriceps as the primary muscle group, with the glutes and hamstrings as secondary. Kelly Matthews, who coaches the “Coach Kelly Cues” exercise library, says the quad stimulus is hard to beat; John Meadows says it will destroy your quads whichever way you set your feet.
No published study measures the machine. A PubMed search on October 7, 2026 for “pendulum squat” returned nine papers, none about this exercise, so nothing establishes that it builds more muscle than a hack squat or a leg press.
Set up the machine
Start with the machine empty. Matthews’ first point is that every pendulum squat is different, above all in how much the unloaded arm weighs: some feel light empty, some heavy. Set up with no plates, then add weight.
Decide what the stopper does, and find the hooks. On her machine a stopper at the bottom controls depth; she removes it to go as low as possible but says it helps if you are tall. A high hook and a low one rack the arm; the low one lets you climb out if you get stuck at the bottom.
Set the platform angle. Her platform adjusts and she sets it halfway, neither vertical nor flat; Meadows’ machine also had an adjustable foot plate. Matthews sometimes wears squat shoes to raise her heels and get lower.
Tuck the pelvis and press the low back into the pad. Matthews sets a slight posterior pelvic tilt before the first rep and uses the pad as feedback: if you cannot feel your low back against it, tuck more, and keep that contact all set. Meadows’ version is to keep your back on the pad, particularly as the weight goes up. Longer arms can push into the bar for stability, Matthews says; she holds the shoulder pads.
Foot placement and depth
Set the feet where you reach full depth. Matthews’ test is the bottom position: hamstrings and calves touching, knees driving toward the toes, tail tucked. For her that is about midway up the platform; it changes with femur length and height. Meadows refuses to give an exact foot position for the same reason: experiment.
Heels: the two coaches differ. Meadows never gets up on his toes on this machine and drives through the heel. Matthews says a little heel lift is fine, because the goal is the quads. Pick one and keep it.
Brace, then lower without rushing. Once unracked, Matthews sets the feet, takes a big inhale and braces through the belly, as before a big compound lift. Lower under control, knees toward the toes down the middle of the feet, and do not bottom out.
Stop just short of locking the knees. Matthews drives up until the knees are almost straight and stops there to keep the quads working; locking out is not wrong, she says, but a soft bend keeps the reps rolling.
Beside the hack squat and the barbell
| Pendulum squat | Hack squat | Barbell back squat | |
|---|---|---|---|
| Where the load is | On a lever arm behind you, through pads on your shoulders and back | On a sled that slides along rails | On your upper back |
| Path | An arc around the lever’s pivot | A straight line along the rails | Wherever you balance it |
| Back support | A pad | A pad | None |
Meadows never puts it first in a session, preferring to be warmed up by another exercise, and he is more confident running a drop set or cluster set on it than under a barbell because the back is supported. That is a coach’s judgement; no trial compares the three.
Logging
Brolic logs Pendulum Squat (Machine) in reps with a load. Enter the plates you added and note the machine, because the unloaded arm’s weight differs between brands and your number does not carry between gyms. Write the platform angle and stopper setting beside it, and keep hack squats and leg presses in their own histories. The free workout log has room for those notes, and the weekly set tally shows how these sets add to your quadriceps work.
Common questions
How heavy should I start? With nothing on the arm. Matthews calls the machine humbling and neither coach gives a figure, so add plates once the pelvis stays tucked and the low back stays on the pad.
My knees or back hurt on it. Stop the set. Meadows’ remark about little pressure on his knees and back is his experience on his machine, not a promise about yours.
Sources and method
- Kelly Matthews: How to pendulum squat — setup, stopper, platform, hooks, pelvic tilt, hand and foot cues, the stop short of lockout; automatic captions.
- John Meadows (mountaindog1): Exercise index, pendulum squat — placement in a session, drop and cluster sets, foot position, the heel cue, the back on the pad; automatic captions.
- PubMed search for “pendulum squat” on October 7, 2026 — nine results, none about the machine.
- Brolic catalog — name, alias, logging mode and muscle tags.
Setup positions are the two coaches’ starting points on their own machines, not optima from a trial; the table separates equipment, it does not rank it.
