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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.
| Score | Scoring Definition | Significance | |||
| 0 | Shank angle is greater than (Trunk angle + 10 degrees) | Poor Hip Strategy | |||
| 1 | Trunk and Shank angles are within 10 degrees | Fair Hip Strategy | |||
| 2 | Trunk angle is greater than (Shank angle + 10 degrees) | Good Hip Strategy |
