Fig. 2. Measurement of knee-in distance (KID: distance from great toe to point where line connecting center of patella and anterior superior iliac spine intersects floor, red line) and hip-out distance (HOD: distance from great toe to projection of anterior superior iliac spine on floor, blue line) during the single-leg step down using Kinovea® software. (A) Initial position, (B) KID and HOD without dynamic knee valgus, (C) KID and HOD with excessive dynamic knee valgus.
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