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KMID : 1148720210090010001
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2021 Volume.9 No. 1 p.1 ~ p.5
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Difference in Muscle Activity of Respiratory Muscle During Maximum Inspiration and Expiration Due to Position Change and Tool Use
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Kim Keun-Jo
Rong Zang
Jo Dong-Hyeok
Jeong Ju-Eun
Kim Gyeong-Gyu
Kim Min-Zy
Kim Mun-Kyu
Kim Hyun-Seung
Park Kyeong-Hyeon
Park Sae-Rom
Lee Yeong-Jun
Jeon Da-Bin
Jung Tae-Hwan
Xiong Shu-Han
Liu Lin
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Abstract
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Purpose : In this study, we aimed to measure how respiratory muscle activity changes as posture changes. We also aimed to measure the inspiratory sternocleidomastoid (SCM) and upper trapezius (UT) muscle activities as well as expiratory rectus abdominis (RA) and oblique abdominis (OA) muscle activities in healthy male and female university students in their twenties.
Methods : Using the percentage of reference voluntary contraction (% RVC) with electromyography, we measured the SCM, UT, RA, and OA muscle activities in 16 healthy male and female university students in their 20s according to position change and breather tool use.
Results : We found that the average value of inspiratory and expiratory muscle activities by posture was highest when using the breather tool. When using the tool with 10-mm and 2-mm straws for standard breathing at rest in the sitting position, a statistically significant increase in SCM, UT, and OA activities occurred (p < 0.05). For standard breathing at rest in the supine position, a statistically significant increase in SCM, RA, and OA activities occurred (p < 0.05).
Conclusion : In clinical application, it may be better to use a respiratory muscle-strengthening tool to increase the activity of inspiratory and expiratory muscles.
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KEYWORD
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Muscle Activity, SCM, UT, RA, OA, (%)RVC
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