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Technical Details

  • Variable Type: Movement Flag
  • Data Type: Integer
  • Units: N/A
  • Column Name: early_extension
  • Optimal Direction: Lower is better
  • Unknown Value: -1
  • Measurement: Derived from the Loss of Posture Pelvis direction component
  • Threshold: Mid-pelvis position moves more than 10 cm (0.1 m) toward the ball (Z-axis) between P1 Address and P7 Impact

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Description

Early Extension flags a golfer whose pelvis thrusts toward the ball during the downswing rather than continuing to rotate in place. It is derived from the Loss of Posture pelvis-direction breakdown, specifically when the flagged displacement occurs along the Z-axis (toward the ball).

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Use Cases

  • Posture fault detection
  • Power leak identification
  • Injury risk screening