Development of lower limb muscle strength training method for older adults with skin cold stimulation

针对老年人皮肤冷刺激力量训练方法的开发，研究结果如下：1)皮肤冷刺激对肌力训练的检验，2)皮肤冷刺激对肌力动态收缩和静态收缩的影响，3)皮肤温度对肌力训练无效的检验，4)皮肤冷刺激对肌力训练和去训练的力量增益的影响，5)皮肤冷刺激低强度肌力训练对老年肌力的影响。本研究的结果如下：1)当训练强度为35% MVC时，冷刺激活动肌上方皮肤可增加最大肌肉强度。尽管进行了低强度训练，但所获得的力量增益仍在先前研究的范围内。2)与静态训练相比，动态训练显著提高。3) 26℃以上促进HT-MUs， 25℃以下抑制LT-MUs。这些结果表明，高温阈值力与皮肤温度有关，低温阈值力与皮肤温度下降速度有关。4)在低强度训练后，冷刺激仍能增加肌肉力量和肌电图，即使在一年的去训练期后，训练效果仍然存在。5)在老年人中，在训练强度为35% MVC的情况下，皮肤冷刺激可使最大伸膝前肌增加1次/周，持续8周。这些结果表明，低强度皮肤冷刺激训练对神经适应性的培养更有效，是老年人饮食康复的有效训练方法。

For the Development of strength training method for older adults with skin cold stimulation, the studies were peifonned as follows ; 1)The examination of strength training used skin cold stimulation, 2)The effects on the musde activity of dynamic and static contraction with skin cold stimulation, 3)The examination of skin temperature to be ineffective strength training, 4)The effects on the strength gains of the strength training and detraining with skin cold stimulation, and 5)The effects of the low-intensity strength training to the older ackilt with skin cold stimulation.The results of present study were indicated as follows ; 1)The maximum musde strength could be increased by cold stimulation of the skin above the active muscle, though the training intensity was 35% MVC.The obtained strength gain was contained in range of the previous study in spite of the low-intensity training. 2)Dynamic training was significantly increased to compare with static training. 3)HT-MUs was facilitated above 26℃, and LT-MUs was inhibited below 25℃.These results suggested that the threshold force of HT-MUs depend on skin temperature and LT-MUs depends on decrease speed of skin temperature.4)The musde strength and EMG was increased by cold stimulation even after training at a low-intensity, and the effect of training remained even after the one-year detraining period 5)In the case of older adults, the maximum knee extensor foree could be increased at one time/week for 8 weeks by skin cold stimulation, though the training intensity was 35% MVC.These result were suggested that low-intensity training by cold skin stimulation is more effective in gaining neural adaptation, and this method is effective training to older adults and dining rehabilitation.