Kannus P, Järvinen M, Lehto M
McClure Musculoskeletal Research Center, Department of Orthopedics and Rehabilitation, University of Vermont, Burlington 05405.
Eur J Appl Physiol Occup Physiol. 1991;63(2):112-8. doi: 10.1007/BF00235179.
This study assessed the relationship between the isokinetic peak torque (PT) (speed of movement 1.05 and 3.14 rads-1) and the angle-specific torques (ASTs) at 0.26 and 1.31 rad of knee flexion in multiple contractions of the quadriceps and hamstrings in 70 individuals with a chronic anterior cruciate ligament (ACL) insufficiency and 78 individuals with a chronic medial collateral ligament (MCL) insufficiency in one knee. At every test speed, the Pearson product moment correlation coefficients (r) between the PT and ASTs were highly significant (P less than 0.001) in the uninjured knees (r = 0.61-0.93) as well as in the knees with ACL (r = 0.61-0.87) and MCL (r = 0.74-0.91) insufficiency. In addition, in both groups the majority of the correlation coefficients exceeded 0.80, which is generally regarded as the threshold for the relationship to be considered clinically significant. Furthermore, using regression analysis, both extremities showed completely non-systematic distribution of the residuals. It is concluded that in healthy knees or knees with ACL or MCL insufficiency, the predictability of ASTs from PT was good, and, therefore, that AST analyses may offer little additional information about thigh muscle function to that obtained from a simpler and more commonly used measurement, the PT analysis.
本研究评估了70例慢性前交叉韧带（ACL）功能不全患者和78例慢性内侧副韧带（MCL）功能不全患者单膝关节股四头肌和腘绳肌多次收缩时等速峰值扭矩（PT）（运动速度为1.05和3.14弧度/秒）与膝关节屈曲0.26和1.31弧度时特定角度扭矩（AST）之间的关系。在每个测试速度下，未受伤膝关节（r = 0.61 - 0.93）以及ACL功能不全膝关节（r = 0.61 - 0.87）和MCL功能不全膝关节（r = 0.74 - 0.91）中，PT与AST之间的Pearson积矩相关系数（r）均高度显著（P < 0.001）。此外，在两组中，大多数相关系数均超过0.80，一般认为该阈值代表的关系具有临床意义。此外，通过回归分析，双侧肢体的残差均显示出完全非系统性分布。研究得出结论，在健康膝关节或ACL或MCL功能不全的膝关节中，由PT预测AST的能力良好，因此，AST分析对于大腿肌肉功能所提供的额外信息，可能并不比从更简单且常用的测量方法——PT分析中获得的信息多。
