Somewhere between "ass to grass or it doesn't count" and "never go past ninety degrees, it shreds your knees," the actual answer got lost. So here it is, without the tribal jerseys: squat as deep as you can while your heels stay down and your trunk holds one shape. For most people, trained patiently, that's below parallel. Getting there is a journey, not an entry requirement.

The two myths, retired

Myth one: deep squats wreck knees. This one has been dead in the research for decades but still haunts gym floors. A knee that bends deeply under a load it's prepared for is a knee getting stronger. Depth beyond parallel is never, by itself, a fault — the world's most durable squatters live down there.

Myth two: anything above parallel is worthless. Also no. A partial squat still trains; it just trains less range than you own, and over time the range you don't visit stops being yours. Parallel matters as a benchmark mostly because it's a repeatable benchmark — hip crease below knee is checkable on video, while "felt deep" is not.

What the numbers say — and how to read yours

On a side-on video, depth shows up two ways. The hip-versus-knee picture at the bottom, and the knee angle at its deepest — where 180 degrees is standing tall and smaller means deeper. Parallel usually lives around 90 to 100 degrees of knee bend. A knee angle stuck well above 115 usually travels with a partial rep.

CoachVision measures both from a side-on clip — depth versus knee and your deepest knee bend — and reads them together with the bottom keyframe rather than shouting a verdict off one number, because a single 2-D measurement deserves a cross-check. Worth knowing: its bands treat very deep as ideal. There is no score penalty for burying a squat. Only the clearly-partial rep gets coached, and even then the first question is why it's partial.

Depth is earned, not forced

Because that's the real issue. When depth comes up short, one of two things is true:

  • A mobility wall — usually ankles. If your heels lift or your chest dives toward your knees as you descend, your body is spending position to buy depth. Forcing more range from there just moves the bill to your lower back. The fix is mobility work that hands you the range honestly.
  • A confidence ceiling — everything measures clean, the trunk holds, the balance line is quiet, and the squat still turns around early. This is the more common one, and it's great news: the range exists, your nervous system just doesn't trust the bottom yet.

The trunk-fold trade is the tell. Deep depth numbers plus a torso folding toward horizontal means depth is outrunning mobility — squat to the depth your trunk can hold today, and go earn more.

The drill — Paused Bottom Holds

Trust is built by spending time in the place you don't trust. Squat to your honest depth — the deepest point where heels stay down and chest stays proud — and hold for five full seconds. Knees pushed out, breath steady. Five holds of five seconds.

The bottom position stops being a place you visit in a hurry and becomes home. Most lifters find their squat drifts deeper over a few weeks of holds without ever being told to go deeper — the ceiling was never the hips.

Film one side-on set a week and watch your deepest knee bend trend down as the holds do their work. That number falling is depth being earned — the only kind worth having.