Although patients with femoroacetabular impingement demonstrate abnormal kinematics during single-leg squat, their hip coordination angle variability remains unchanged

Introduction

Patients with femoroacetabular impingement syndrome may exhibit altered hip and ankle kinematics during single-leg squat, but whether hip flexion–adduction coordination variability is affected remains unclear. This study aimed to compare hip and ankle kinematics and hip coordination angle variability between patients with FAIS and healthy controls during single-leg squat.