Why does my hurdler's hips rotate open over the barrier?
Rotating hips and drifting sideways look alike from the stands but come from different faults, and only one of them shows up on a side-on camera.
A hurdler who clears clean but lands angled across the lane, rather than straight down it, is usually rotating their hips open over the barrier rather than drifting sideways. The two faults look similar from the stands and come from different places.
Rotation versus drift
Drift is the whole body moving sideways across the hurdle, usually because the trail leg swings wide instead of tucking through. Rotation is narrower: the hips twist open around the body's vertical axis while the shoulders stay roughly square, so the lead leg lands pointed slightly across the lane instead of straight ahead. An athlete can rotate without drifting much at all, which is why fixing the trail leg sometimes does nothing for this particular fault.
Where it usually comes from
- A lead leg that snaps down and across the body instead of straight down, pulling the hip on that side around with it.
- A trail leg that clears late and has to swing wide to get through in time, torquing the hips as it comes around.
- An arm action that crosses the body rather than driving front to back, which the hips tend to follow.
The fix almost always starts at the lead leg or the trail leg, not at the hips themselves. Hips rotate because something attached to them is moving wrong. They are rarely the actual problem.
What a side-on camera can and cannot see
The Film Room's hurdles setting reports trunk dip over the barrier, lead-leg extension, how far the hips rise, and overstride between barriers, all read from a side-on clip. Rotation happens around the vertical axis, toward or away from the camera, which is the one direction a single flat clip is structurally unable to resolve. A hurdler can show a clean trunk dip and good lead-leg extension on the numbers and still be rotating badly, because that fault barely moves the two measurements a side-on camera can actually take.
This is coaching guidance from a pose analysis, not a diagnosis. Seeing rotation clearly usually takes a front-on or overhead angle, a second camera and a different set up from the one the Film Room was built around.
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Related
Why does my hurdler drift sideways over the hurdle?
A lead leg cutting across the body is usually the cause, and it is also the one hurdles fault a side-on camera cannot actually show you.
Read →Why does my hurdler's trail leg knee swing out to the side?
A trail leg that sweeps around the hip instead of folding under it costs width and time at every single hurdle, and it rarely starts with the trail leg itself.
Read →Why your hurdler's lead arm collapses across their body
The lead arm is meant to punch straight at the lead foot, and when it swings across instead the next stride pays for it.
Read →Try it: Hurdle technique analysis from video: trunk dip, lead leg, hip rise