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首页> 外文会议>Conference on industrial and commercial applications of smart structures technologies; 20090309-10; San Diego, CA(US) >Effects of the Lower Extremities Muscle Activation during Muscular Strength Training on an Unstable Platform with Magneto-Rheological Dampers
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Effects of the Lower Extremities Muscle Activation during Muscular Strength Training on an Unstable Platform with Magneto-Rheological Dampers

机译：在不稳定的平台上进行磁流变阻尼器的肌肉力量训练过程中，下肢肌肉激活的影响

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摘要

Adequate postural balance depends on the spatial and temporal integration of vestibular, visual, and somatosensory information. Especially, the musculoskeletal function (range of joint, flexibility of spine, muscular strength) is essential in maintaining the postural balance. Muscular strength training methods include the use of commercialized devices and repeatable resistance training tools (rubber band, ball, etc). These training systems cost high price and can't control of intensity. Thus we suggest a new training system which can adjust training intensity and indicate the center of pressure of a subject while the training was passively controlled by applying controlled electric current to the Magneto-Rheological damper. And we performed experimental studies on the muscular activities in the lower extremities during maintaining, moving and pushing exercises on an unstable platform with Magneto rheological dampers. A subject executed the maintaining, moving and pushing exercises which were displayed in a monitor. The electromyographic signals of the eight muscles in lower extremities were recorded and analyzed in the time and frequency domain: the muscles of interest were rectus femoris, biceps femoris, tensor fasciae latae, vastus lateralis, vastus medialis, gastrocnemius, tibialis anterior, and soleus. The experimental results showed the difference of muscular activities at the four moving exercises and the nine maintaining exercises. The rate of the increase in the muscular activities was affected by the condition of the unstable platform with MR dampers for the maintaining and moving exercises. The experimental results suggested the choice of different maintaining and moving exercises could selectively train different muscles with varying intensity. Furthermore, the findings also suggested the training using this system can improve the ability of postural balance.
机译：适当的姿势平衡取决于前庭，视觉和体感信息的时空整合。尤其是，肌肉骨骼功能（关节范围，脊柱柔韧性，肌肉力量）对于维持姿势平衡至关重要。肌肉力量训练方法包括使用商品化的器械和可重复使用的阻力训练工具（橡皮筋，球等）。这些培训系统价格昂贵，而且强度无法控制。因此，我们提出了一种新的训练系统，该系统可以通过在磁流变阻尼器上施加受控电流来被动控制训练，同时可以调节训练强度并指示受试者的压力中心。并且，我们在具有磁流变阻尼器的不稳定平台上进行维持，移动和推动运动时，对下肢的肌肉活动进行了实验研究。受试者进行了保持，移动和推举练习，这些练习显示在监视器中。在时域和频域记录并分析了下肢的八块肌肉的肌电信号：感兴趣的肌肉是股直肌，股二头肌，张肌筋膜，阔侧肌，股内侧肌，腓肠肌，胫骨前肌和比目鱼肌。实验结果表明，在四项运动和九项维持运动中，肌肉活动有所不同。肌肉活动的增加速率受用于保持和运动锻炼的带有MR阻尼器的不稳定平台条件的影响。实验结果表明，选择不同的维持和运动方法可以选择性地训练不同强度的不同肌肉。此外，研究结果还表明，使用该系统进行训练可以提高姿势平衡的能力。

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