Board contact: foot under the body, not in front
Reaching for the board with the foot ahead of the body brakes you. Optimal foot strike is directly under the hips, drive vertical, not horizontal.
Long jump takeoff happens in 0.12 seconds. Board contact, drive-leg punch, takeoff angle, arms swinging up, all in one moment. Here's the full breakdown, plus how AI grades each frame of your takeoff.
Reaching for the board with the foot ahead of the body brakes you. Optimal foot strike is directly under the hips, drive vertical, not horizontal.
The drive leg (free leg) drives knee-high, punches upward. Most takeoff errors are a passive drive leg, not enough vertical impulse.
Optimal long jump takeoff angle is 18-22 degrees from horizontal. Higher and you lose distance to height; lower and you crash into the pit. AI measures yours.
AI extracts the exact frame of board contact and measures angles, drive-leg position, and arm swing. The takeoff is too fast to coach by eye, but obvious frame by frame.
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