The Relationships Among Sagittal-Plane Lower Extremity Moments: Implications for Landing Strategy in Anterior Cruciate Ligament Injury Prevention
The Relationships Among Sagittal-Plane Lower Extremity Moments: Implications for Landing Strategy in Anterior Cruciate Ligament Injury Prevention
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DOI：
10.4085/1062-6050-44.1.33
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发表时间：
2009-01-01
影响因子：
3.3
通讯作者：
Schmitz, Randy J.
中科院分区：
文献类型：
--
作者：
Shimokochi, Yohei;Lee, Sae Yong;Schmitz, Randy J.
内容：股四头肌过度收缩伴腘绳肌共同收缩不足已被证明是非接触性前交叉韧带（ACL）损伤的可能促成因素。评估下肢内部力矩之间的关系可能会提供一些见解，以避免肌肉收缩模式，增加ACL injury risk.Objective：探讨膝伸肌力矩与踝跖屈肌和髋伸肌力矩之间的关系，并探讨膝力矩与压力中心之间的关系，作为衡量神经肌肉对质心位置的反应。设计：横断面研究。应用神经力学研究实验室。患者或其他参与者：18名健康、娱乐活跃的女性（年龄= 22.3 +/- 2.8岁，身高= 162.5 +/- 8.1 cm，体重= 57.8 +/- 9.3 kg）。干预：参与者从45 cm的盒子上单腿着陆到测力板上。主要结果测量：计算净峰值膝伸肌力矩（KEMPk）、矢状面踝关节（AM）和髋关节（HM）净内部力矩以及前后压力中心相对于KEMPk时足质心（COP）之间的Pearson积矩相关系数。较低的KEMPk与较大的AM（r =-0.942，P < .001）和HM（r =-0.657，P = .003）相关。我们还发现，更多的前向位移的COP与更大的AM（r =-0.750，P < .001）和较低的KEMpk（r 0.618，P = .006）。我们的研究结果表明，在着陆过程中全身前倾的参与者可能会产生更多的跖屈肌力矩和更少的膝伸肌力矩，可能增加髋伸肌力矩和减少膝伸肌力矩的产生。这些结果表明，前倾可能是一种技术，以减少股四头肌收缩的需求，同时增加腿筋协同收缩的需求在单腿着陆。
Context: Excessive quadriceps contraction with insufficient hamstrings muscle cocontraction has been shown to be a possible contributing factor for noncontact anterior cruciate ligament (ACL) injuries. Assessing the relationships among lower extremity internal moments may provide some insight into avoiding muscle contraction patterns that increase ACL injury risk.Objective: To examine the relationships of knee-extensor moment with ankle plantar-flexor and hip-extensor moments and to examine the relationship between knee moment and center of pressure as a measure of neuromuscular response to center-of-mass position.Design: Cross-sectional study.Setting: Applied Neuromechanics Research Laboratory.Patients or Other Participants: Eighteen healthy, recreationally active women (age = 22.3 +/- 2.8 years, height = 162.5 +/- 8.1 cm, mass = 57.8 +/- 9.3 kg).Intervention(s): Participants performed a single-leg landing from a 45-cm box onto a force plate. Kinetic and kinematic data Were collected.Main Outcome Measure(s): Pearson product moment correlation coefficients were calculated among the net peak knee-extensor moment (KEMpk), sagittal-plane ankle (AM) and hip (HM) net internal moments, and anterior-posterior center of pressure relative to foot center of mass at KEMpk (COP).Results: Lower KEMpk related to both greater AM (r = -0.942, P < .001) and HM (r = -0.657, P = .003). We also found that more anterior displacement of COP was related to greater AM (r = -0.750, P < .001) and lower KEMpk (r 0.618, P = .006).Conclusions: Our results suggest that participants who lean the whole body forward during landing may produce more plantar-flexor moment and less knee-extensor moment, possibly increasing hip-extensor moment and decreasing knee-extensor moment production. These results suggest that leaning forward may be a technique to decrease quadriceps contraction demand while increasing hamstrings cocontraction demand during a single-leg landing.