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Tsukamoto T, Maruyama H, Kato M, et al. Characteristics of respiratory muscle fatigue upon inhalation resistance with a maximal inspiratory mouth pressure of 50. J Phys Ther Sci. 2019;31(4):318-325doi: 10.1589/jpts.31.318.
Tsukamoto, T., Maruyama, H., Kato, M., Uchida, M., & Kubo, A. (2019). Characteristics of respiratory muscle fatigue upon inhalation resistance with a maximal inspiratory mouth pressure of 50. Journal of physical therapy science, 31(4), 318-325. https://doi.org/10.1589/jpts.31.318
Tsukamoto, Toshiya, et al. "Characteristics of respiratory muscle fatigue upon inhalation resistance with a maximal inspiratory mouth pressure of 50." Journal of physical therapy science vol. 31,4 (2019): 318-325. doi: https://doi.org/10.1589/jpts.31.318
Tsukamoto T, Maruyama H, Kato M, Uchida M, Kubo A. Characteristics of respiratory muscle fatigue upon inhalation resistance with a maximal inspiratory mouth pressure of 50. J Phys Ther Sci. 2019 Apr;31(4):318-325. doi: 10.1589/jpts.31.318. Epub 2019 Apr 01. PMID: 31037002; PMCID: PMC6451961.
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J Phys Ther Sci. 2019 Apr;31(4):318-325. doi: 10.1589/jpts.31.318. Epub 2019 Apr 01.

Characteristics of respiratory muscle fatigue upon inhalation resistance with a maximal inspiratory mouth pressure of 50.

Journal of physical therapy science

Toshiya Tsukamoto, Hitoshi Maruyama, Michitaka Kato, Masaki Uchida, Akira Kubo

Affiliations

  1. Department of Shizuoka Physical Therapy, Faculty of Health Sciences, Tokoha University:1-30 Mizuochi-cho, Aoi-ku, Shizuoka-shi, Shizuoka 420-0831, Japan.
  2. Graduate School, International University of Health and Welfare, Japan.

PMID: 31037002 PMCID: PMC6451961 DOI: 10.1589/jpts.31.318

Abstract

[Purpose] Considering that respiratory muscle fatigue is a cause of respiratory failure, we aimed to clarify the characteristics of respiratory muscle fatigue under inhalation load and investigate its impact on individual respiratory muscles. [Participants and Methods] The study included 14 healthy adult male volunteers. Maximal inspiratory and expiratory mouth pressures were measured under inhalation load and while at rest. The statuses of the trapezius, sternocleidomastoid, pectoralis major, diaphragm, rectus abdominis, and external and internal abdominal oblique muscles were also assessed using electromyographic frequency analysis. [Results] The maximal inspiratory and expiratory mouth pressures decreased over time and recovered after rest. The median power frequency decreased significantly in the sternocleidomastoid and rectus abdominis muscles at maximal inspiratory and expiratory mouth pressures, respectively, under inhalation load. [Conclusion] As a characteristic of respiratory muscle fatigue, there is a possibility that decreases in maximal inspiratory and expiratory mouth pressures as a result of the inhalation load affect muscle fatigue in the sternocleidomastoid and rectus abdominis muscles.

Keywords: Maximal mouth pressure; Respiratory muscle fatigue; Surface electromyogram

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