====== 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 of each other || Fair Hip Strategy||
|| 2 || Trunk angle is greater than (Shank angle + 10 degrees) || Good Hip Strategy||

{{ :hip_strategy.png?nolink&400 |}}