Lage K J, White S C, Yack H J
Department of Physical Therapy and Exercise Science, State University of New York at Buffalo 14214.
Med Sci Sports Exerc. 1995 Jan;27(1):8-14.
The purpose of this study was to identify the effects of knee immobilization on uninvolved lower extremity joints during gait. Video and force platform data were collected for seven subjects walking normally (N) and with the knee fixed at three flexion angles: 0 degrees (B00), 10 degrees (B10), and 20 degrees (B20). A bilateral, sagittal plane link-segment model was used to determine lower limb kinematic and kinetic measures. Mean data from three normal and five braced gait trials were compared using one-way repeated measures ANOVA (P < 0.05). Significant increases in involved limb (IL) ankle generation work (J.kg-1) during propulsion were evident: (N = 0.249, B00 = 0.295, B10 = 0.293, B20 = 0.308). There were significant increases in peak IL hip power (W.kg-1) in early stance (N = 0.638, B00 = 1.056, B10 = 1.018, B20 = 1.097) and in IL hip absorption work (J.kg-1) during late stance (N = 0.049, B00 = 0.080, B10 = 0.082, B20 = 0.079). The hip of the uninvolved limb (UL) displayed significant increases in generation work (J.kg-1) in early stance (N = 0.089, B00 = 0.183, B10 = 0.149, B20 = 0.179). Normal kinematic and kinetic patterns of other joints were changed with knee immobilization. The major effects were increases in the magnitude of IL peak hip and ankle joint kinetic measures. Fixing the knee in 10 degrees of flexion resulted in the fewest significant changes in normal gait mechanics.
本研究的目的是确定膝关节固定对步态期间未受累下肢关节的影响。收集了7名受试者正常行走（N）以及膝关节固定在三个屈曲角度：0度（B00）、10度（B10）和20度（B20）时的视频和力平台数据。使用双侧矢状面链接段模型来确定下肢运动学和动力学指标。使用单向重复测量方差分析比较了三次正常步态试验和五次支具步态试验的平均数据（P < 0.05）。在推进过程中，受累肢体（IL）踝关节产生的功（J.kg-1）有显著增加：（N = 0.249，B00 = 0.295，B10 = 0.293，B20 = 0.308）。在早期站立时，IL髋关节峰值功率（W.kg-1）有显著增加（N = 0.638，B00 = 1.056，B10 = 1.018，B20 = 1.097），在后期站立时，IL髋关节吸收的功（J.kg-1）有显著增加（N = 0.049，B00 = 0.080，B10 = 0.082，B20 = 0.079）。未受累肢体（UL）的髋关节在早期站立时产生的功（J.kg-1）有显著增加（N = 0.089，B00 = 0.183，B10 = 0.149，B20 = 0.179）。膝关节固定会改变其他关节的正常运动学和动力学模式。主要影响是IL髋关节和踝关节峰值动力学指标的幅度增加。将膝关节固定在10度屈曲时，正常步态力学的显著变化最少。
