Fig. 1

Single-leg landing task. Participants stood on a 30-cm high box (a), then dropped off of the box and landed on a force plate that was on the same side as the landing leg (b). In the trunk-obliquity landing condition, participants were asked to incline their trunk by 15° toward the landing leg while on the box and keep this orientation until the landing foot contacted the force plate. Under natural landing condition, no specific instructions about trunk position were given. The trunk obliquity angle was defined as the angle between the line connecting C7 and the Th10 marker and a vertical line