Lee Song Joo, Ren Yupeng, Geiger Francois, Chang Alison H, Press Joel M, Zhang Li-Qun
Rehabilitation Institute of Chicago, Chicago, IL 60611, USA.
Annu Int Conf IEEE Eng Med Biol Soc. 2010;2010:4846-9. doi: 10.1109/IEMBS.2010.5627276.
The goal of this study was to investigate the efficacy of off-axis neuromuscular control training using a pivoting elliptical machine. Although knee motion is mainly in flexion/extension, injuries to the knee are usually associated with excessive off-axis movement (tibial axial rotation and valgus/varus). A pivoting elliptical training system was developed to improve neuromuscular control about the off-axes. Six week training was conducted in nine healthy individuals and seven healthy individuals served as control and only participated in evaluation sessions. Our results showed that following the pivoting elliptical training, individuals were able to reduce pivoting instability across different phases of the elliptical cycle (p〈0.01) and also mediolateral instability at mid and terminal swing phase (p〈0.05). A trend of reduced response time and phase dependent changes in EMG patterns were also observed. The results showed that the pivoting elliptical training is effective to improve off-axis neuromuscular control in healthy individuals and such training protocol can potentially be implemented to prevent knee injury.
本研究的目的是调查使用旋转椭圆机进行离轴神经肌肉控制训练的效果。尽管膝关节运动主要是屈伸运动，但膝关节损伤通常与过度的离轴运动（胫骨轴向旋转和内翻/外翻）有关。开发了一种旋转椭圆训练系统以改善离轴方向的神经肌肉控制。对9名健康个体进行了为期六周的训练，7名健康个体作为对照组，仅参加评估环节。我们的结果表明，经过旋转椭圆训练后，个体能够在椭圆周期的不同阶段减少旋转不稳定性（p〈0.01），并且在摆动中期和末期减少内外侧不稳定性（p〈0.05）。还观察到反应时间缩短以及肌电图模式随相位变化的趋势。结果表明，旋转椭圆训练对于改善健康个体的离轴神经肌肉控制是有效的，并且这种训练方案有可能用于预防膝关节损伤。
