The aim of the present study was to inspect differences between healthy and ACLR football players through a kinematic on-field assessment of cut manoeuvres. 62 (47 healthy, 15 ACLR) were enrolled. The players performed planned 90° changes of direction and unplanned football-specific changes of direction. Kinematics was collected through 8 wearable inertial sensors (MTw Awinda, Xsens). Healthy and ACLR players differed in hip and knee rotation during the entire cut phase (p<0.045), in hip and knee flexion at initial foot contact (p<0.001), and pelvis-trunk tilt and rotation (p<0.036). A tool to determine the risk of knee loading based on the dangerous movement patterns emerged was provided. Differences between healthy and ACLR players persisted after RTS clearance, the tool provided can support clinicians in RTS through objective on-field measurements.
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