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Technical Details

  • Variable Type: Movement Flag
  • Data Type: Integer
  • Units: N/A
  • Column Name: reverse_spine_angle
  • Optimal Direction: Lower is better
  • Unknown Value: -1
  • Measurement: Mid-shoulder X position vs. mid-pelvis X position, between P1 Address and P5 Transition
  • Threshold: Mid-shoulder X position exceeds mid-pelvis X position by more than 5 cm (0.05 m) at any point during the backswing

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Description

Reverse Spine Angle flags a backswing fault where the upper body tilts toward the target instead of away from it, identified when the mid-shoulder position moves ahead of the mid-pelvis position (along the swing direction) by more than 5 cm between Address and Transition.

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Use Cases

  • Posture fault detection
  • Backswing mechanics coaching
  • Injury risk screening