disc-golf-neil
Birdie Member
- Joined
- Oct 10, 2023
- Messages
- 466
I think the yellow line is the imaginary mathematical Axis of Rotation. The spine is not the axis, it precesses around the axis on a tilted spiral. The front leg itself is not really the axis either although it's close, the ankle is the base of the axis as everything pivots centered around it.
If the rear leg was the axis of rotation, then it would be moving/wandering around during the throw which would kill rotational velocity.