Bennett J G, Stauber W T
Med Sci Sports Exerc. 1986 Oct;18(5):526-30.
Various authors have indicated that muscle imbalances might lead to knee pain and the potential for knee injury during sports. However, few reports have been published to substantiate such a hypothesis. But in all of the existing studies, only concentric torque measurements were evaluated. The purpose of the present study was to document any torque deficiencies which might be present during eccentric exercise in patients with knee pain. Of 130 patients with various knee disorders, 41 demonstrated a suppression in torque production during the eccentric exercise and generally in the portion of the range of movement between 30 degrees and 60 degrees of knee flexion (P less than 0.05). These individuals fit the criteria for anterior knee pain syndrome and demonstrated remarkable improvement after training 3 times/wk at concentric-eccentric exercises of the knee extensors at various speeds (30 degrees, 60 degrees, and 90 degrees . s-1) on a computer-controlled dynamometer (KIN/COM). In some cases, the pain as well as their torque deficiency was relieved after only 2 wk of training, most others were relieved after 2 to 4 wk of training.
不同的作者指出，肌肉失衡可能导致膝关节疼痛以及运动期间膝关节受伤的可能性。然而，鲜有报告发表以证实这一假说。但在所有现有研究中，仅评估了向心扭矩测量。本研究的目的是记录膝关节疼痛患者在离心运动期间可能存在的任何扭矩不足情况。在130例患有各种膝关节疾病的患者中，41例在离心运动期间以及通常在膝关节屈曲30度至60度的运动范围内表现出扭矩产生受抑制（P小于0.05）。这些个体符合膝前疼痛综合征的标准，并且在使用计算机控制测力计（KIN/COM）以不同速度（30度、60度和90度·秒⁻¹）对膝伸肌进行向心-离心运动，每周训练3次后，症状有显著改善。在某些情况下，仅训练2周后疼痛以及他们的扭矩不足就得到缓解，大多数其他患者在训练2至4周后得到缓解。
