Gait modification strategies in trunk over right stance phase in patients with right anterior cruciate ligament deficiency

Abstract This study aimed to investigate the gait modification strategies of trunk over right stance phase in patients with right anterior cruciate ligament deficiency (ACL-D). Thirty-six patients with right chronic ACL-D were recruited, as well as 36 controls. A 3D optical video motion capture system was used during gait and stair ambulation. Kinematic variables of the trunk and kinematic and kinetic variables of the knee were calculated. Patients with chronic right ACL-D exhibited many significant abnormalities compared with controls. Trunk rotation with right shoulder trailing over the right stance phase was lower in all five motion patterns ( P P P  = 0.01), when descending stairs at the maximal knee coronal plane moment ( P P  = 0.03). Trunk rotation with right shoulder forward was higher at the minimal knee transverse plane moment ( P P P