Ishii Nobuhisa, Tomita Kazuhide, Suetake Shinsuke, Okuno Yukako, Kawamura Kenta, Takeshima Reiko, Ohse Hirotaka, Imura Shigeyuki
Graduate School of Health Science, Ibaraki Prefectural University of Health Sciences: 4669-2 Ami, Ibaraki 300-0394, Japan.
Ibaraki Prefectural Central Hospital, Japan.
J Phys Ther Sci. 2018 Feb;30(2):238-241. doi: 10.1589/jpts.30.238. Epub 2018 Feb 20.
[Purpose] It is unclear whether diaphragmatic breathing (DB) results in lower respiratory muscle oxygen consumption during dynamic exercise. The purpose of this study was to compare oxygen consumption in the respiratory muscles (VOrm) with thoracic breathing (TB) and with DB, in healthy males during hyperventilation. [Subjects and Methods] Ten healthy men participated in this study. The subjects sat on a chair with the backrest reclined at an angle of 60 degrees. Respiratory parameters were measured breath by breath, using an expired gas analyzer. Oxygen consumption was measured for three minutes during quiet breathing. Measurements during TB and DB were performed for one minute each, after connecting a rebreather loading device. The breathing pattern was analyzed by inductance plethysmography, using transducer bands placed over the chest and abdomen that recorded thoracoabdominal movements. [Results] Both ΔVO/body weight and VOrm decreased significantly with DB when compared to that with TB, during hyperventilation. [Conclusion] DB results in less respiratory muscle oxygen consumption, even during dynamic exercise.
[目的] 尚不清楚在动态运动期间膈肌呼吸（DB）是否会降低呼吸肌的氧消耗。本研究的目的是比较健康男性在过度通气期间，采用胸式呼吸（TB）和膈肌呼吸时呼吸肌的氧消耗（VOrm）。[对象与方法] 10名健康男性参与了本研究。受试者坐在靠背倾斜60度的椅子上。使用呼出气体分析仪逐次测量呼吸参数。在安静呼吸期间测量三分钟的氧消耗。在连接再呼吸负荷装置后，分别进行一分钟的胸式呼吸和膈肌呼吸测量。使用放置在胸部和腹部的传感器带记录胸腹运动，通过电感体积描记法分析呼吸模式。[结果] 在过度通气期间，与胸式呼吸相比，膈肌呼吸时ΔVO/体重和呼吸肌氧消耗均显著降低。[结论] 即使在动态运动期间，膈肌呼吸也会使呼吸肌的氧消耗减少。
