Why your long jump takeoff feels flat
The takeoff angle is decided on the step before the board, not on the board, and you can measure it from a phone.
A flat takeoff is one of the few faults an athlete can feel and still not fix, because the thing that caused it happened before the foot hit the board. By the time it feels wrong it is already too late to do anything about it.
What flat actually means
Takeoff angle is the angle of the hips' fastest upward travel at the moment the athlete leaves the ground. Long jumpers usually sit somewhere around 18 to 22 degrees. Much flatter and the jump is all speed with no time in the air. Much steeper and the athlete has traded away the horizontal velocity the approach spent six seconds building.
Both faults feel the same from the runway. Both feel like the jump did not happen. The number is what separates them.
It is the penultimate step, not the board
The second-to-last step is where the hips lower slightly so the last step can raise them again. If the hips are still high going into the board, there is nothing to push against and the athlete runs off the board rather than jumping from it. That is the flat one.
If the hips drop too far, the last step becomes a brake, the athlete jams into the board and the angle goes steep. Same fault in the opposite direction, and again it feels identical from the inside.
What to check
- Film side-on, level with the board, athlete filling the frame.
- Look at the hips over the last three steps, not the arms and not the face.
- Compare the same athlete on a good jump and a bad one before comparing them to anybody else.
StatLap measures the takeoff angle from the hip trace and tells you where it sits against the usual band, along with how far the hips actually rose as a share of body height. That second number is the useful one across attempts: more lift from the same approach speed usually means the plant improved.
Measured from 2D video, so a side-on camera at hip height is what makes the number trustworthy. An angled view exaggerates it. This is coaching guidance, not a diagnosis.
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Related
Why your long jumper keeps fouling
Three red flags in a row is rarely carelessness at the board. It is a run-up that was never the same length twice.
Read →Which foot should a high jumper take off from?
The foot decides which side the run starts from, and most athletes have already shown you their jumping foot somewhere other than the high jump.
Read →Why your high jumper clears 1.60 and then misses 1.65 three times
The bar went up five centimetres. Almost nothing about the jump should have changed, and a phone can show you what did.
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