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Trunk Stability
- Determine YZ values of pelvis and spine-high joint center values at timepoint of max knee flexion
- Calculate the difference in Y and Z between pelvis and spine-high joint centers
- Calculate trunk lean angle by inverse tangent of difference in Y over difference in Z
- Metric calculated for Step Down, Lateral Shuffle, Triple Jump, Deceleration, Cut.
- If Trunk Lean is greater than 10 degrees, score is 0.
- If Trunk Lean is less than 10 degrees & greater than 6 degrees, score is 1.
- If Trunk Lean is less than 6 degrees, score is 2.
