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Technical Details

  • Variable Type: Discrete Metric
  • Data Type: Boolean
  • Units: True/False
  • Column Name: flying_open
  • Measurement: Trunk angular velocity peak timing and X-factor at foot contact
  • Threshold: Trunk angular velocity peaks before foot contact AND X-factor within 5° of neutral (0°) at foot contact

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Description

Flying open is a binary indicator that flags early trunk rotation during the pitch. It occurs when the trunk angular velocity is peaking before foot contact and the X-factor (hip-shoulder separation) is within 5 degrees of 0 at foot contact.

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Use Cases

  • Timing assessment
  • Rotation sequencing evaluation