Lower-extremity compensations following anterior cruciate ligament reconstruction
Lower-extremity compensations following anterior cruciate ligament reconstruction
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DOI：
10.1093/ptj/80.3.251
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发表时间：
2000-03-01
期刊：
影响因子：
3.2
通讯作者：
Ball, DW
中科院分区：
文献类型：
--
作者：
Ernst, GP;Saliba, E;Ball, DW
背景和目的。几项研究表明，膝关节损伤患者在单腿跳跃测试中得分在正常范围内，但在非负重等速测试中表现出股四头肌无力。本研究评估下肢动力学，而受试者进行单腿垂直跳跃（VJ）和横向步进（LSU），试图解释这一现象。主题和方法。使用运动分析和力平台系统，髋关节，膝关节和踝关节的伸展力矩的20名受试者与前交叉韧带（ACL）重建和20名匹配的受试者进行了测量，而他们进行了LSU和VJ。结果方差分析显示，ACL重建肢体的膝关节伸展力矩低于LSU，VJ起飞和VJ着陆期间的未受伤和匹配的肢体。然而，在LSU和VJ起飞过程中，四肢之间的总伸展力矩（髋+膝+踝）没有差异。ACL重建肢体在VJ着陆时的总伸展力矩小于未受累和匹配肢体。结论和讨论。这些结果表明，髋关节或踝关节伸肌可以补偿膝关节伸展力矩的不足。在VJ着陆过程中ACL重建肢体的总伸展力矩的减少代表着陆力的衰减不足，这可能会使骨骼和关节结构受到损伤。
Background and Purpose. Several studies have demonstrated that patients with knee injury scored within a normal range during one-legged hop tests yet showed quadriceps femoris muscle weakness with non-weight-bearing isokinetic testing. This study evaluated lower-extremity kinetics while subjects performed a single-leg vertical jump (VJ) and a lateral step-up (LSU) in an attempt to explain this phenomenon. Subjects and Methods. Using a motion analysis and force platform system, hip, knee, and ankle extension moments of 20 subjects with anterior cruciate ligament (ACL) reconstructions and 20 matched subjects were measured while they performed an LSU and a VJ. Results. An analysis of variance revealed that the knee extension moment of the ACL-reconstructed extremity was lower than that of the uninjured and matched extremities during the LSU, VJ take-off, and VJ landing. However, there was no difference in summated extension moment (hip + knee + ankle) among extremities during the LSU and VJ take-off. The summated extension moment of the ACL-reconstructed extremity during VJ landing was less than that of the uninvolved and matched extremities. Conclusions and Discussion. These results suggest that the hip or ankle extensors may compensate for the knee extension moment deficit. The decrease in summated extension moment in the ACL-reconstructed extremity during VJ landing represents inadequate attenuation of landing forces, which may expose the skeleton and joint structures to injury.