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

•Gait modification strategies of trunk were apparent in patients with right ACL-D.•When walking, trunk anterior rotation over the right stance phase was higher.•When ascending stairs, trunk lateral flexion to the left was higher over the right stance.•When descending stairs, trunk lateral flexion to the left was higher over the right stance.•When descending stairs, either trunk posterior lean or lateral flexion to right was higher.