Knutzen K M, Bates B T, Schot P, Hamill J
Med Sci Sports Exerc. 1987 Jun;19(3):303-9.
The influence of knee bracing was evaluated during the activity of running by examining ground reaction forces and knee joint movement parameters assessed electrogoniometrically. Twenty-one subjects were assigned to 1 of 3 groups based on medical records provided by a physician: normal or non-injury group; anterior cruciate ligament lesion/laxity group; and anterior cruciate ligament repair group. Four test conditions were investigated: healthy or control limb; injured or experimental limb; Generation II knee brace; and Marquette Knee Stabilizer knee brace. Ten running trials were performed for each condition at a photoelectrically controlled running pace (3.33 +/- 0.11 m X s-1). There were no significant differences as a result of group membership for both electrogoniometer and force platform analyses (P less than 0.05). There was a significant difference across the four test conditions. Both knee brace applications were shown to significantly reduce knee flexion during swing and support, total rotation, and total varus/valgus movement parameters of the experimental knee joint. Both brace applications were also shown to alter the experimental limb by increasing the relative time to the achievement of the initial collision force, creating a greater collision force and thereby creating larger impulses in both the vertical and foreaft directions during the initial contact phase.
通过检查地面反作用力和采用电子测角法评估的膝关节运动参数，对跑步活动期间膝关节支具的影响进行了评估。根据医生提供的病历，将21名受试者分为3组中的1组：正常或未受伤组；前交叉韧带损伤/松弛组；以及前交叉韧带修复组。研究了四种测试条件：健康或对照肢体；受伤或实验肢体；第二代膝关节支具；以及马凯特膝关节稳定器支具。在光电控制的跑步速度（3.33±0.11米×秒-1）下，对每种条件进行了10次跑步试验。对于电子测角仪和力平台分析，组间成员关系未产生显著差异（P<0.05）。四种测试条件之间存在显著差异。两种膝关节支具的应用均显示，在摆动和支撑过程中，实验膝关节的屈膝、总旋转以及总内翻/外翻运动参数均显著降低。两种支具的应用还显示，通过增加达到初始碰撞力的相对时间来改变实验肢体，从而产生更大的碰撞力，并因此在初始接触阶段在垂直和前后方向上产生更大的冲量。
