External loading of the knee joint during running and cutting maneuvers.
External loading of the knee joint during running and cutting maneuvers.
复制标题
跑步和切削动作期间膝关节的外部负载。
DOI：
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复制
发表时间：
2001
影响因子：
4.1
通讯作者：
T. Ackland
中科院分区：
文献类型：
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作者：
T. Besier;D. Lloyd;Jodie L Cochrane;T. Ackland
目的
研究动态截骨任务期间施加于膝关节的外部载荷，并评估韧带载荷的可能性。
方法
一个50赫兹的VICON运动分析系统被用来确定下肢运动学的11名健康男性受试者在运行，回避，交叉切割。一个运动学模型，结合力的地方数据来计算在站立阶段的膝关节的三维负荷。
结果
膝关节的外部屈曲/伸展载荷在不同任务中相似;然而，在侧步和交叉切割过程中施加到膝关节的内翻/外翻和内旋/外旋力矩显著大于正常跑步过程中测量的力矩（P < 0.05）。侧步任务引起屈曲，外翻，和内部旋转的组合负载，而交叉切割任务引起屈曲，内翻，和外部旋转的组合负载。
结论
与跑步相比，在侧步和交叉切割动作期间增加韧带载荷的可能性是内翻/外翻和内/外旋力矩大幅增加的结果，而不是外屈曲力矩的任何变化。在切割任务的站立阶段期间施加到膝关节的组合外部力矩被认为将ACL和侧副韧带置于损伤的风险中，特别是在0度和40度之间的膝关节屈曲角度下，如果不使用适当的肌肉激活策略来对抗这些力矩的话。
PURPOSE
To investigate the external loads applied to the knee joint during dynamic cutting tasks and assess the potential for ligament loading.
METHODS
A 50-Hz VICON motion analysis system was used to determine the lower limb kinematics of 11 healthy male subjects during running, sidestepping, and crossover cut. A kinematic model was used in conjunction with force place data to calculate the three-dimensional loads at the knee joint during stance phase.
RESULTS
External flexion/extension loads at the knee joint were similar across tasks; however, the varus/valgus and internal/external rotation moments applied to the knee during sidestepping and crossover cutting were considerably larger than those measured during normal running (P < 0.05). Sidestepping tasks elicited combined loads of flexion, valgus, and internal rotation, whereas crossover cutting tasks elicited combined loads of flexion, varus, and external rotation.
CONCLUSION
Compared with running, the potential for increased ligament loading during sidestepping and crossover cutting maneuvers is a result of the large increase in varus/valgus and internal/external rotation moments rather than any change in the external flexion moment. The combined external moments applied to the knee joint during stance phase of the cutting tasks are believed to place the ACL and collateral ligaments at risk of injury, particularly at knee flexion angles between 0 degrees and 40 degrees, if appropriate muscle activation strategies are not used to counter these moments.