Which muscles matter most for a long jumper's takeoff?
The board asks the jump leg to do a different job than the approach just finished doing, and the muscles that matter most shift in the final two steps.
The approach is essentially sprinting, so the same hip-extension-first ranking applies for most of the runway. The last two steps and the board itself ask something different: the leg has to absorb a lot of speed and redirect part of it upward without losing all of the forward motion that got the athlete there.
The penultimate step changes the job
The second-to-last step lowers the hips slightly to set up the plant angle, which loads the quads eccentrically as they control that bend, while the glutes keep the hip extending rather than letting the athlete sit back into the step. At the board itself, the calf and ankle need to be stiff enough to make the contact short and springy. A plant that spends too long on the ground loses the speed it was supposed to convert.
Ranked by what the takeoff actually needs
- Quads, working eccentrically, to control the bend at the plant without collapsing all the way down.
- Glutes and hamstrings, to keep driving the free leg through and keep the hip extending instead of sitting back.
- Calf and ankle stiffness, to keep the plant short and springy rather than long and soft.
A jumper who tests strong in the weight room but soft at the board is often missing that specific eccentric quad and calf piece, not overall leg strength in general.
What film shows, and what it does not
The long jump setting reports takeoff angle against the 18 to 22 degree band, hip rise as a share of body height, and trunk and arms through the approach. A flat takeoff angle or low hip rise is consistent with a plant leg that collapsed rather than stayed stiff, but the clip cannot say whether that collapse comes from a strength deficit, a habit built over years, or plain fatigue on that particular jump.
A camera cannot isolate which muscle gave way at the plant, and it cannot measure eccentric strength directly. It can only show the angle the plant leg ended up at. Whether to fix that with a drill or a strength program in the weight room is a coaching and training decision the clip does not make for you.
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Related
Which muscles matter most in a high jumper's plant leg?
The plant leg takes a split-second load well above body weight, and the muscle that actually gives way there is rarely the one a parent would guess.
Read →Why does my long jumper land shorter than their speed says they should?
A fast approach and a short landing usually means the speed never converted at the board, not that the athlete stopped being fast.
Read →Why does my high jumper's takeoff leg stay bent instead of straightening at the top of the jump?
The takeoff leg is meant to snap straight in a fraction of a second, and whatever extension goes missing there, height goes missing with it.
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