Skip to main content

Ankle Rotation

Overview​

This metric calculates the amount of ankle rotation experienced during a crash impact. Excessive rotation indicates abnormal joint loading that exceeds the physiological tolerance of the ankle and surrounding structures, thereby serving as a predictor of injury risk. [1]

Required Signals​

  • Right and Left Ankle Angle Rotation (Radians) (X, Y, and Z)

Calculation​

  1. Convert ankle rotation signals to degrees (if applicable)
  2. Filter ankle rotation signals (CFC = 180)
  3. Calculate the maximum value in each each axis (x, y, z) for both ankles
  4. Find start and finish position for each axis for both ankles

ankle rotation

Ankle rotation can happen along the x,y,and z axis" (black)

[1] Funk, J. Ankle Injury mechanisms: Lessions learned from cadaveric studies. Clinical Anatomy, 2011. Volume 24, Issue 3.