Curved approach builds centripetal force
The J-curve approach (start straight, curve in for the last 3-5 strides) generates inward lean. That lean converts to vertical force at takeoff. Approach radius matters as much as approach speed.
Fosbury flop is high jump. Every modern high jumper uses it. The technique combines a curved approach, a quick rotation at takeoff, and a back-arched clearance. Here's the full breakdown.
The J-curve approach (start straight, curve in for the last 3-5 strides) generates inward lean. That lean converts to vertical force at takeoff. Approach radius matters as much as approach speed.
At takeoff, the lead arm and free leg drive up, body rotates so back faces the bar. Done well, rotation initiates at takeoff, not in flight.
Peak height comes when shoulders are over the bar, hips on the way up, head leaning back. Back arch happens at peak, not before. Most flop errors are arching too early.
AI grades each of the five phases (approach, penultimate, takeoff, rotation, clearance) separately. The flop is too fast to coach by eye, but obvious phase by phase.
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