Department of Health and Sports, Niigata University of Health and Welfare, Niigata, Japan.
J Sports Sci. 2011 Nov;29(14):1525-34. doi: 10.1080/02640414.2011.599038. Epub 2011 Oct 12.
Female athletes are considered to exhibit knee and trunk motion that is characteristic of anterior cruciate ligament (ACL) injury. The aim of this study was to examine the in vivo motion of the trunk and knee during a cutting manoeuvre and determine the relationship between them. All participants (10 male and 10 female college athletes) performed a shuttle run cutting task with the left limb. Trunk inclination (forward and lateral) and knee joint angles (flexion/extension, abduction/adduction, and internal/external tibial rotation) were calculated. Differences between the sexes and associations between knee motion and trunk inclination were examined. An increase in trunk forward inclination was strongly correlated with an increase in knee flexion angle and moderately correlated with a decrease in the excursion of internal tibial rotation. An increase in right trunk lateral inclination was moderately correlated with an increase in excursion of internal tibial rotation. The results also showed differences between the sexes in trunk forward inclination, lateral inclination, and knee flexion angle, but no such differences in knee abduction or internal tibial rotation. Trunk inclination is related to knee flexion and excursion of internal tibial rotation. Female athletes demonstrate a low trunk forward inclination and knee flexion angle, a posture that resembles that of ACL injury.
女性运动员的膝关节和躯干运动被认为具有前交叉韧带（ACL）损伤的特征。本研究旨在研究在切割动作过程中躯干和膝关节的体内运动，并确定它们之间的关系。所有参与者（10 名男性和 10 名女性大学生运动员）均用左腿进行了穿梭跑切割任务。计算了躯干倾斜度（前倾和侧倾）和膝关节角度（屈伸、外展/内收以及胫骨内/外旋）。检查了性别差异和膝关节运动与躯干倾斜之间的关系。躯干前倾角度的增加与膝关节屈曲角度的增加呈强相关，与胫骨内旋活动度的减少呈中度相关。右侧躯干侧倾角度的增加与胫骨内旋活动度的增加呈中度相关。研究结果还显示，男女之间在躯干前倾、侧倾和膝关节屈曲角度方面存在差异，但在膝关节外展或胫骨内旋方面没有差异。躯干倾斜与膝关节屈曲和胫骨内旋活动度有关。女性运动员的躯干前倾角度和膝关节屈曲角度较低，这种姿势类似于 ACL 损伤。
