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Technical Details

  • Variable Type: Discrete Metric
  • Data Type: Boolean
  • Units: True/False
  • Column Name: sway
  • Measurement: Position of front knee, head midpoint, or body center of mass relative to back leg
  • Threshold: 15 cm (~6 in) of forward/backward movement in the 0.4 s around max knee raise event

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Description

Sway is a binary indicator that flags excessive backwards body motion (away from home plate) around max knee raise. Occurs if the pelvis keypoint (center of the hips) moves backwards more than 15 cm (~6 in)

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Use Cases

  • Balance analysis
  • Movement efficiency assessment
  • Stability evaluation