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http://dx.doi.org/10.15268/ksim.2022.10.1.129

Effects of Applying Intensity on Muscle Activity and Muscle Hardness of Upper Trapezius Muscle in Adult Males applying Transcutaneous Electrical Nerve Stimulation  

Kim, Chung-Yoo (Dept. of Rehabilitation Medicine, Busan St. Mary's Hospital)
Bae, Won-Sik (Dept. of Physical Therapy, Kyungnam College of Information & Technology)
Cha, Young-Joo (Dept. of Physical Therapy, Cheju Halla University)
Publication Information
Journal of The Korean Society of Integrative Medicine / v.10, no.1, 2022 , pp. 129-136 More about this Journal
Abstract
Purpose : The purpose of this study was to investigate the effect of applying intensity on the muscle activity and muscle hardness of the upper trapezius muscle in adult males when TENS (transcutaneous electrical nerve stimulation) was applied. In addition, this study intends to prepare the scientific basic data of TENS for the purpose of relaxation based on the experimental results. Methods : Eighty-seven healthy adult males participated in the experiment, and they were randomly divided into an experimental group and a control group. All subjects in this study were healthy subjects without musculoskeletal or nervous system damage. All subjects were subjects who voluntarily consented to the purpose and method of the experiment. All subjects were provided with a load by typing for 20 minutes, and muscle activity and muscle hardness of the upper trapezius muscle were measured immediately. Afterwards, TENS was given to each groups for 15 minutes, and the experimental group received stimulation at the motor threshold level, and the control group received a placebo stimulation. After stimulation, muscle activity and muscle hardness of the upper trapezius muscle were measured in the same method. The measured data were compared between groups through an independent t-test and dependent t-test. The statistical significance level was set at .05. Results : The application of TENS statistically significantly decreased the muscle activity and muscle hardness of the trapezius muscle in the experimental group, and the results showed a significant difference from the control group. Conclusion : Application of TENS significantly decreased the muscle activity and muscle stiffness of the upper trapezius muscle. The application of TENS of applying intensity that induces muscle contraction may induce relaxation by reducing the muscle activity and muscle hardness of the trapezius muscle.
Keywords
muscle activity; muscle contraction; muscle hardness; muscle tension; TENS;
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