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Technical Details

  • Variable Type: Discrete Metric
  • Data Type: Float
  • Units: meters (m)
  • Column Name: Varies by event/phase and squat type
  • Measurement: Medial displacement of the knee
  • Direction: outward positive (+), inward negative (-)

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Events / Phases

This metric can be reported at different events or phases depending on squat type:
  • At Bottom: At the Bottom event.
    • Column examples: right_knee_valgus_at_bottom, left_knee_valgus_at_bottom (bodyweight, overhead, single leg).
  • Eccentric Full: Maximum knee valgus during the eccentric phase (Initiation to Bottom).
    • Column examples: right_valgus_distance_eccentric, left_valgus_distance_eccentric (bodyweight, overhead); left_valgus_distance_eccentric, right_valgus_distance_eccentric (single leg, per stance leg).
  • Concentric Full: Maximum knee valgus during the concentric phase (Ascent Start to End).
    • Column examples: right_valgus_distance_Concentric / right_valgus_distance_concentric, left_valgus_distance_concentric (bodyweight, overhead); single leg uses left/right per stance leg.

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Description

Knee valgus measures the amount of medial (inward) knee motion during the squat. Excessive knee valgus motion is associated with increased injury risk and suboptimal loading. Reported separately for left and right in bilateral squats; single-leg squats report the stance-leg side.

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Use Cases

  • Injury risk screening
  • Movement quality and knee control
  • Bilateral comparison