Yu JaeHo, Lee SoYeon, Kim HyongJo, Seo DongKwon, Hong JiHeon, Lee DongYeop
Department of Physical Therapy, SunMoon University, Asan, Korea.
Technol Health Care. 2014;22(3):395-402. doi: 10.3233/THC-140796.
The application of transcutaneous electrical nerve stimulation (TENS) enhances muscle weakness and static balance by muscle fatigue. It was said that TENS affects decrease of the postural sway. On the other hand, the applications of TENS to separate dorsi-plantar flexor and the comparison with and without visual input have not been studied. Thus, the aim of this study was to compare the effects of TENS on fatigued dorsi-plantar flexor with and without visual input. 13 healthy adult males and 12 females were recruited and agreed to participate as the subject (mean age 20.5 ± 1.4, total 25) in this study after a preliminary research. This experiment was a single group repeated measurements design in three days. The first day, after exercise-induced fatigue, the standing position was maintained for 30 minutes and then the postural sway was measured on eyes open(EO) and eyes closed(EC). The second, TENS was applied to dorsi flexor in standing position for 30 minutes after conducting exercise-induced fatigue. On the last day, plantar flexor applied by TENS was measured to the postural sway on EO and EC after same exercise-induced fatigue. The visual input was not statistically difference between the groups. However, when compared of dorsi-plantar flexor after applied to TENS without visual input, the postural sway of plantar flexor was lower than the dorsi flexor (p< 0.05). As the result, the application of TENS in GCM clinically decreases the postural sway with visual input it helps to stable posture control and prevent to falling down.
经皮电刺激神经疗法（TENS）的应用通过肌肉疲劳增强肌肉无力和静态平衡。据说TENS会影响姿势摆动的减少。另一方面，尚未研究将TENS分别应用于背屈肌和跖屈肌以及有无视觉输入时的比较。因此，本研究的目的是比较有无视觉输入时TENS对疲劳的背屈肌和跖屈肌的影响。在初步研究后，招募了13名健康成年男性和12名女性并同意作为受试者参与本研究（平均年龄20.5±1.4，共25人）。本实验为单组重复测量设计，为期三天。第一天，运动诱发疲劳后，保持站立姿势30分钟，然后在睁眼（EO）和闭眼（EC）状态下测量姿势摆动。第二天，在运动诱发疲劳后，在站立位将TENS应用于背屈肌30分钟。在最后一天，在相同运动诱发疲劳后，测量将TENS应用于跖屈肌时在EO和EC状态下的姿势摆动。两组之间的视觉输入无统计学差异。然而，在无视觉输入情况下应用TENS后比较背屈肌和跖屈肌时，跖屈肌的姿势摆动低于背屈肌（p<0.05）。结果，在临床上，在有视觉输入的情况下应用TENS可减少姿势摆动，有助于稳定姿势控制并防止跌倒。
