Why does my high jumper clear the bar without their hips getting above it?
It is usually the arch working the way it is supposed to, and it is also the exact moment the Film Room already admits it cannot measure well.
A parent or a coach watches the video back, sees the bar go over cleanly, and cannot square it with the hips looking level with the bar rather than above it. The instinct is that the number must be wrong or the jump was lucky. Usually neither is true. That is what a good arch is for.
The trick is the arch, not the height
In the Fosbury flop, an efficient arch lets different parts of the body cross the bar at different moments, some above it and some below it, while the athlete's centre of mass, which sits close to the hips, passes at or even slightly under the bar the whole time. That is the entire point of the flop over older styles: the jumper does not have to lift their full centre of mass over the bar to clear it. Hips that never look higher than the bar is frequently a sign the arch did its job, not a sign the jump underperformed.
What the hip rise number is actually measuring
The Film Room reports hip rise as a share of body height for a high jump attempt, and it is a lift number, not a clearance verdict. It tells you how much vertical lift the plant produced. That is genuinely useful for comparing one attempt against another with the same approach, but a single attempt's number does not tell you, on its own, whether the bar came off.
- How much the shoulders and legs drop below the hips at the peak, which is the arch itself.
- How accurately the plant landed relative to the bar, since a plant even slightly off line changes everything after it.
- Timing: an arch started too early or held too late costs clearance even with plenty of lift to spend.
The app already says plainly where it stops for this event: trunk and arm angles are left out of a high jump report, because the number would average across the whole clip, approach, flight and landing together, and because lean has no sign, so leaning back away from the bar reads the same as folding into it. Frame-step to the plant and judge the arch by eye. For the approach itself, run the same clip through the sprint setting instead, where the trunk numbers actually mean something.
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Related
Why your high jumper knocks the bar off on the way down
Legs taking the bar after the hips have cleared is a timing fault at the top, and usually a takeoff point that drifted before it.
Read →Why doesn't my high jumper's back arch over the bar?
A flat clearance over the bar usually starts well before the bar, in a plant and a shoulder position that never gave the arch anywhere to happen.
Read →Does arm drive matter in the high jump?
It matters at the margin, and it is one of the few things happening at takeoff that the Film Room genuinely does not measure.
Read →