06/01/2026
High arches (rigid supinators) restrict pronation during early stance, blocking the hip internal rotation needed for efficient weight transfer and glute loading in terminal stance.
Gait rotation coupling
Initial contact–midstance: Hip internally rotates 10–15° as body advances over stance foot, coupling with subtalar pronation (eversion 4–6°) for shock absorption.
Terminal stance: Supination rebounds (inversion 2–5°) + relative hip external rotation aligns femur for propulsion. Rigid high arches skip pronation → premature supination → limited hip IR range.
Tight hip compensation
Limited hip IR (