Ask five lifters whether their squat hits depth and you'll get five confident answers, four of them generous. Depth is the squat's most argued-about quality precisely because, from inside the rep, you cannot feel it. The hole at your honest depth and the hole two inches above it feel nearly identical — which is why every powerlifting meet employs judges, and why your training needs a stand-in for one.
The stand-in is a camera, side-on, at hip height. But a camera only helps if you read it honestly, so let's talk about how.
What "depth" actually is — and where it hides
The standard everyone borrows from powerlifting: hip crease below the top of the knee. Simple to say, slippery to see. From the front you can't see it at all. From a phone sitting on the floor, the upward angle flattens your squat and a legal rep can look high. From a side-on camera at hip height, it's right there — freeze the bottom frame and look.
Here's the part almost nobody tells you: even body-tracking software has to be careful with this call. CoachVision measures your depth by comparing the tracked hip marker to the tracked knee marker — and the hip marker sits a bit above your actual hip crease. That's why a squat a referee would pass often reads around −0.1 on its depth-versus-knee measurement rather than zero, and why the app never declares "above parallel" or "below parallel" from the number alone. The honest verdict is always the number plus the bottom keyframe it pulls for you, read together. A depth check that pretends to more certainty than the camera has isn't a check — it's flattery with decimals.
There's a second witness worth knowing: knee bend. Around 90 to 100 degrees of knee angle usually travels with parallel; stuck well above that usually travels with a partial. Two measurements agreeing beats one measurement insisting.
Deep is never the problem
One thing to settle before you chase depth: below parallel is not dangerous territory. Very deep squats are fine when your heels stay down and your trunk holds its shape. The only depth that gets coached is missing depth — and even that is often a confidence ceiling rather than a mobility wall. If your torso, balance, and tempo all read clean but the depth comes up short, your body likely has the range and simply doesn't trust the bottom yet.
The drill — Box Squats to Depth
A box is a judge that never blinks. Set a box or bench at the height where your hip crease sits just below your knee — check it once on video, then trust it. Squat back and down until you touch, pause one beat without rocking, drive up. 3 sets of 8, bodyweight or light.
The box does two jobs. It teaches your body exactly where depth lives, so the bottom becomes a known address instead of a guess. And it removes the mid-rep negotiation — no more "that felt low enough." You touched or you didn't.
Then close the loop weekly: film a side-on set, and let CoachVision's depth read and bottom frame tell you whether the box's lesson is showing up in your free squat. Most lifters discover their honest depth is either closer than they feared or shallower than they believed — both are good news, because both replace a guess with a fact. One box session and one filmed set this week. That's your judge, hired.