Influence of trunk flexion on hip and knee joint kinematics during a controlled drop landing
Influence of trunk flexion on hip and knee joint kinematics during a controlled drop landing
复制标题
DOI：
10.1016/j.clinbiomech.2007.10.003
复制
发表时间：
2008-03-01
影响因子：
1.8
通讯作者：
Padua, Darin A.
中科院分区：
文献类型：
--
作者：
Blackburn, J. Troy;Padua, Darin A.
背景直立姿势和着陆时膝关节外翻是前交叉韧带损伤的危险因素。虽然以前的研究表明耦合的膝盖和髋关节运动学，躯干定位下肢运动学的影响尚未确定。我们假设，在着陆时躯干屈曲度越大，膝关节和髋关节屈曲度越大，膝关节外翻越少。确定一个可改变的因素（如躯干屈曲），积极影响多个下肢关节的运动学将是非常宝贵的前交叉韧带损伤的预防工作。40名健康人完成了两个下降着陆任务，而膝盖，臀部和躯干运动学采样。第一个任务构成自然/首选着陆策略（首选），而在第二个任务中，受试者主动弯曲躯干着陆时（弯曲）。与Preferred相比，Flexed的躯干屈曲角度峰值大47度（P < 0.001），并且与髋关节屈曲角度峰值增加31度（P < 0.001）和膝关节屈曲角度峰值增加22度（P < 0.001）相关。在着陆过程中，主动躯干屈曲导致膝关节和髋关节屈曲角度同时增加。在着陆过程中，更多的屈曲/较少的直立姿势与前交叉韧带损伤风险降低相关。因此，将更大的躯干屈曲作为前交叉韧带损伤预防计划的组成部分可能是必要的。(C)2007爱思唯尔有限公司保留所有权利。
Background. An erect posture and greater knee valgus during landing have been implicated as anterior cruciate ligament injury risk factors. While previous research suggests coupling of knee and hip kinematics, the influence of trunk positioning on lower extremity kinematics has yet to be determined. We hypothesized that greater trunk flexion during landing would result in greater knee and hip flexion and lesser knee valgus. Identification of a modifiable factor (e.g. trunk flexion) which positively influences kinematics of multiple lower extremity joints would be invaluable for anterior cruciate ligament injury prevention efforts.Methods. Forty healthy individuals completed two drop landing tasks while knee, hip, and trunk kinematics were sampled. The first task constituted the natural/preferred landing strategy (Preferred), while in the second task, subjects actively flexed the trunk upon landing (Flexed).Findings. Peak trunk flexion angle was 47 degrees greater for Flexed compared to Preferred (P < 0.001), and was associated with increases in peak hip flexion angle of 31 degrees (P < 0.001) and peak knee flexion angle of 22 degrees (P < 0.001).Interpretation. Active trunk flexion during landing produces concomitant increases in knee and hip flexion angles. A more flexed/less erect posture during landing is associated with a reduced anterior cruciate ligament injury risk. As such, incorporating greater trunk flexion as an integral component of anterior cruciate ligament injury prevention programs may be warranted. (C) 2007 Elsevier Ltd. All rights reserved.