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Medicine (Baltimore) ; 96(26): e7407, 2017 Jun.
Article in English | MEDLINE | ID: mdl-28658177

ABSTRACT

BACKGROUND: Microcurrent electrical neuromuscular stimulation (MENS) has been suggested to improve muscle function and restore damaged muscle. However, current evidence is insufficient to determine the effectiveness of this therapy in age-dependent muscle weakness. Therefore, a prospective, randomized, double-blinded, sham-controlled clinical trial was designed to evaluate the effects of short-term MENS on muscle function in the elderly. METHODS: A total of 38 healthy elderly participants aged 65 years and above were enrolled and randomly divided into 2 stimulation groups: real or sham MENS group. Real or sham MENS were applied to the 8 anatomical points of the dominant arm and leg during the course of 40 minutes. We performed muscle function tests at baseline and after the intervention: the handgrip strength tests (HGS, kg), the root mean square values (RMS, µV), and the single leg heel-rise tests (HRT) to determine changes in the strength, activity, and endurance of the elderly muscle, respectively. RESULTS: In the real MENS group, the mean values of the HGS and the number of plantar flexions were significantly increased, but the RMS value of the electromyography signal was significantly decreased after the real intervention (P < .05). However, the sham MENS group showed a significant decrease in the number of plantar flexions and the total time for HRT after the sham stimulation (P < .05). The mean difference in the RMS value was significantly lower, but the number of plantar flexions and the total time for HRT was significantly higher in the real MENS group than in the sham MENS group (P < .05). CONCLUSION: The findings suggest that short-term application of MENS may play a partial role in enhancing physical activities of the elderly, as it can improve some muscle function.


Subject(s)
Electric Stimulation Therapy , Muscle, Skeletal/physiology , Aged , Double-Blind Method , Electromyography , Female , Hand Strength/physiology , Humans , Leg/physiology , Male , Physical Endurance/physiology , Time Factors , Treatment Outcome
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