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Knee extension velocity during acceleration

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Technical Details

  • Variable Type: Discrete Metric
  • Data Type: Float
  • Units: degrees/second (°/s)
  • Column Name: acceleration_phase_max_front_knee_extension_velocity or acceleration_phase_max_back_knee_extension_velocity
  • Measurement: Maximum knee extension angular velocity during the acceleration phase (Max Shoulder ER to Apex)

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Description

This metric describes the maximum knee extension velocity for each leg during the acceleration phase of the serve. The maximum value should align with the jumping portion of the serve, correlating with jump height. It reflects lower-body drive and contribution to the kinetic chain as the player extends toward ball contact.

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Use Cases

  • Lower-body drive and timing
  • Kinetic chain assessment
  • Technique comparison