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Why does my high jumper always miss the first attempt at a new height but clear the second?

The first jump at a new height almost never looks like the jumps that cleared the height before it, and the gap between the miss and the clear is usually small enough to film.

The bar goes up to a new height. The first attempt clips it, often barely. The second attempt, same height, clears with room to spare. It happens often enough that coaches start to wonder whether it is nerves, luck, or something they could actually see and fix.

The approach is grooved to the last height that worked

An athlete's run-up speed and plant timing get calibrated to whatever height they have been clearing. Raise the bar, and the approach that worked a few centimetres lower often arrives at the new height slightly flat or slightly late, because nothing in the approach itself changed to account for the extra height. The first jump is really a test of whether the old approach still fits the new number. The second jump happens after the athlete has already felt where it fell short.

What usually changes between the miss and the clear

• Approach speed into the plant, which is often faster and more committed on the second attempt than the first.
• Where the plant foot actually lands relative to the bar, closer or further out the second time.
• How early the athlete starts leaning back toward the bar during the last two strides.

What film of both attempts actually shows

The high jump setting reports hip rise as a share of body height, takeoff angle, and knee fold and extension. Filming the miss and the clear from the same spot and comparing those three numbers turns 'they just needed to see it once' into an actual measured change. If hip rise and takeoff angle both improve on the second jump, the adjustment was real and worth coaching for directly, so the first attempt stops being a wasted one. If the numbers barely move, the gap between a miss and a clear may have been closer to luck than anyone wants to admit.

A camera cannot tell you whether the first miss was nerves or a genuinely wrong plant. It can only tell you whether the numbers changed between the two jumps. Reading intent or confidence off a set of angles is still a coaching judgment, not something the film does for you.

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