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Technical Details

  • Variable Type: Discrete Metric
  • Data Type: Float
  • Units: ratio (0–1)
  • Column Name: Varies by phase and footedness (see Events / Phases)
  • Measurement: Relative contribution of hip vs. knee flexion motion during the specified phase, computed via vector coding of the lead leg’s hip and knee angles

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Events / Phases

  • Eccentric: From Initiation to Bottom.
    • Column names: lunge_forward_right_eccentric_hip_knee_dominance (right footedness), lunge_forward_left_eccentric_hip_knee_dominance (left footedness). Non-lead side is NaN.
  • Concentric: From Bottom to End.
    • Column names: lunge_forward_right_concentric_hip_knee_dominance (right footedness), lunge_forward_left_concentric_hip_knee_dominance (left footedness). Non-lead side is NaN.

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Description

Hip knee dominance describes how much the athlete uses the hip versus the knee joint during the descent or ascent of the forward lunge. A value of 0 indicates a hip-dominant strategy; 1 indicates a knee-dominant strategy. Only the lead (stepping) leg is computed based on footedness. The ratio is determined by the relative amount of range of motion used at the hip and knee joints.

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Use Cases

  • Movement strategy assessment and coaching feedback
  • Injury risk screening (e.g., excessive knee-dominant loading)
  • Comparison of eccentric vs. concentric loading strategies