This is an old revision of the document!
Hip Strategy
- Determine XZ values of pelvis and spine-high joint center at timepoint of max knee flexion
- Calculate the difference in X and Z between pelvis and spine-high joint centers
- Calculate trunk angle by inverse tangent of difference in X over difference in Z
- Determine XZ values of Ankle and Hip joint center values at timepoint of max knee flexion
- Calculate the difference in X and Z between Ankle and Hip joint centers
- Calculate shank angle by inverse tangent of difference in X over difference in Z
- Compare shank angle to trunk angle
- Metric calculated for Step Down, Drop Jump, Lateral Shuffle, Triple Jump, Deceleration, Cut.
- If trunk angle is greater than (shank angle + 10), score is 2
- If shank angle is greater than (trunk angle + 10), score is 2
- Otherwise, score is 1
