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Low-intensity microcurrent therapy promotes regeneration of atrophied calf muscles in immobilized rabbits

The Journal of Biomedical Research 2019年第1期33卷 30-37页

作者： Gi Young Park Dong Rak Kwon Yong Suk Moon Department of Rehabilitation Medicine Muscle Research Center Catholic University of Daegu School of Medicine Department of Anatomy Catholic University of Daegu School of Medicine

The purpose of this study was to investigate the intensity-specific regenerative effects of microcurrent therapy on gastrocnemius muscle atrophy induced by cast-immobilization in rabbits. Fifteen rabbits were randomly allocated to 3 groups after cast removal: cast-immobilization and sham microcurrent therapy for 2 weeks(group 1); castimmobilization and microcurrent therapy(25 μA) for 2 weeks(group 2); cast-immobilization and microcurrent therapy(5,000 μA) for 2 weeks(group 3). Clinical parameters [calf circumference, compound muscle action potential(CMAP) of the tibial nerve, thickness of gastrocnemius muscle], cross sectional area of gastrocnemius muscle fibres,and immunohistochemistry was evaluated. The clinical parameters representing mean atrophic changes in group 2 were significantly lower than those in group 3. The cross sectional area of the gastrocnemius muscle fibres and immunohistochemical parameters in group 2 were significantly greater than those in group 3. The results showed that low-intensity microcurrent therapy can more effectively promote regeneration in atrophied gastrocnemius muscle than high-intensity microcurrent therapy.

关键词： microcurrent intensity atrophy muscle cast

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Electrical Resistance as A Measure of Soft Tissue Injuryfrom Delayed Onset Muscle Soreness

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Journal of Health Science 2014年第8期2卷 353-362页

作者： Timothy Hui Jerrold Petrofsky Iman Akef Khowailed Research Department of Physical Therapy Loma Linda University Loma Linda California 92350 United States

Assessment of muscle damage relies commonly on subjective sensation of pain. The purpose of this research was to test thevalidity of microcurrent conductance on skin over injured tissue to quantify soft tissue injury and recovery following heavy exercisecompared to other indexes of muscle soreness. A randomized, controlled, single-blinded, 1-week trial on 60 ***-University Interventions： Subjects did 3 sets of squats for 5 min each. There were 3 groups of 20 subjects. One did nothing andone had heat applied for 8 h post exercise. The final group had heat 24 h after exercise. Tissue resistance and muscle strength force tomove the knee, analog visual pain scale. In the control group, microcurrent continually decreased, eventually decreasing 32% by thethird day post exercise. When heat was given immediately following exercise, microcurrent was 26% greater （P 〈 0.001）. The painscale rose to 3.1/10 as opposed to 5.4/10 for controls. Strength and muscle elasticity stayed mostly constant after heat as opposed to a28% decrease in strength and increase in stiffness in the control subjects. For 24 h delayed heat, microcurrent was 14% greater（P 〈 0.02）, and was unchanged for the first 24 h when no therapy was given. Pain scale rose to 4.8/10. Stiffness was unchanged whilemuscle strength decreased the same as controls. microcurrent shows agreement with loss of strength, and stiffness from DOMS but notthe subjective pain measure. It appears that microcurrent is a good measure of muscle damage.

关键词： microcurrent conductance, soft tissue injury, recovery.

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