We aimed to quantify the contribution of lower body rotations in producing upward foot velocity during soccer volley kicking. The kicking motions at various ball heights were captured from fifteen male university soccer players using an optical motion capture system at 500 Hz. The effectiveness of lower body rotations in producing upward foot centre of gravity velocity were computed (Sprigings et al., 1994) and time integrated. Major contributors to generating the upward foot CG velocity in volley kicking were 1) knee flection, 2) hip internal rotation, 3) pelvis clock-wise rotation within the frontal plane and 4) hip flection. The contributions of 1) and 4) become smaller as the ball height increased gradually, while the contributions of 2) and 3) become larger systematically.
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