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发展，1)采用皮肤冷刺激进行力量训练，2)皮肤冷刺激对肌肉动、静态收缩活动的影响，3)皮肤温度对力量训练无效的判断，4)皮肤冷刺激力量训练和非训练对力量增长的影响，5)低强度力量训练对皮肤冷刺激老年人力量增长的影响。1)当训练强度为35%MVC时，冷刺激活动肌上方的皮肤可提高最大肌力，尽管训练强度较低，但获得的力量增长仍在前人研究的范围内。2)与静态训练相比，动态训练显著增加。3)在26℃以上可促进HT-MUS，而在25℃以下则抑制LT-MUS。这些结果表明，HT-MUS的阈值力量取决于皮温，LT-MUS取决于皮温下降的速度。4)冷刺激使肌力和肌电增加，即使在低强度训练后也是如此。5)对于老年人，皮肤冷刺激可使最大伸膝肌力每周增加一次，持续8周。虽然训练强度为35%MVC，但结果提示冷刺激低强度训练能更有效地获得神经适应，是老年人有效的训练和饮食康复方法。

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.