健常成人男性における上肢運動負荷試験時の気道閉塞圧:―非指示型上肢運動と支持型上肢運動の比較―  [in Japanese] The Airway Occlusion Pressure During Upper Extremity Exercise in Healthy Adults: Differences between Supported and Unsupported Arm Exercise  [in Japanese]

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Author(s)

    • 藍原 章子 AIHARA Akiko
    • 日本医療科学大学保健医療学部リハビリテーション学科理学療法学専攻:吉備国際大学大学院(通信制)保健科学研究科理学療法学専攻 Couse of Physical Therapy, Department of Rehabilitation, Faculty of Health Science, Nihon Institute of Medical Science:Graduate School of Health Science (Major in Physical Therapy by Distance Learning), Kibi International University
    • 玉利 光太郎 TAMARI Kotaro
    • 吉備国際大学保健医療福祉学部理学療法学科 Department of Physical Therapy, School of Health Science and Social Welfare, Kibi International University
    • 解良 武士 KERA Takeshi
    • 日本医療科学大学保健医療学部リハビリテーション学科理学療法学専攻 Couse of Physical Therapy, Department of Rehabilitation, Faculty of Health Science, Nihon Institute of Medical Science
    • 横山 茂樹 YOKOYAMA Shigeki
    • 吉備国際大学保健医療福祉学部理学療法学科 Department of Physical Therapy, School of Health Science and Social Welfare, Kibi International University
    • 元田 弘敏 MOTODA Hirotoshi
    • 吉備国際大学保健医療福祉学部理学療法学科 Department of Physical Therapy, School of Health Science and Social Welfare, Kibi International University

Abstract

【目的】支持型上肢運動と非支持型上肢運動における呼吸困難感の差異について,呼吸困難感と関連のある気道閉塞圧(P<sub>0.1</sub>)と,換気量と気道閉塞圧の変化量の比(ΔVE/ΔP<sub>0.1</sub>)を用いて検討した。【方法】健常成人男性21名を対象に,同等の酸素摂取量(VO<sub>2</sub>)条件下で3段階(ステージ1〜3),各3分間のそれぞれの運動を実施した。各ステージのP<sub>0.1</sub>,分時換気量(VE),二酸化炭素排出量(VCO<sub>2</sub>),呼吸数(f),二酸化炭素換気当量(VE/VCO<sub>2</sub>)を測定し,主観的な呼吸困難感と上肢の運動強度(上肢RPE)は修正Borg Scaleにて聴取した。【結果】P<sub>0.1</sub>はステージ2,3において非支持型上肢運動の方が有意に高かった。一方でΔVE/ΔP<sub>0.1</sub>に有意な差は認められなかった。換気諸量と呼吸困難感は負荷の増加に伴い,非支持型上肢運動の方が有意に高値を示した。【結論】非支持型上肢運動の方がP<sub>0.1</sub>は高値を示し,換気需要が大きいためにより強い呼吸困難感を呈することが示唆された。

<b>Purpose</b>: The purpose of this study was to examine the effect of supported and unsupported arm exercise on the 2 dyspnea indexes, namely, airway occlusion pressure (P<sub>0.1</sub>) and the ratio of the change in ventilation to the change in P<sub>0.1</sub> (ΔVE/ΔP<sub>0.1</sub>), by using symptom-limited exercise stress testing. <br><b>Methods</b>: Twenty-one healthy male volunteers performed both these exercises with 3 increments (stage 1 to 3) in oxygen consumption, defined as exercise intensity. Each stage was performed at the same intensity between the 2 exercises, to aid in the comparison. The P<sub>0.1</sub>, VE, carbon dioxide production (VCO<sub>2</sub>), respiratory frequency (f), ventilatory equivalent of carbon dioxide (VE/VCO<sub>2</sub>) and the Borg scale rating of perceived dyspnea and arm muscle exertion was obtained at each stage. <br><b>Results</b>: The P<sub>0.1</sub> was significantly greater in the unsupported arm exercise than in the supported arm exercise (P < 0.001); however, there was no difference in ΔVE/ΔP<sub>0.1</sub> between the 2 exercises. With higher load, the corresponding VE, VCO<sub>2</sub>, f, VE/VCO<sub>2</sub> and the Borg scale rating of perceived dyspnea were significantly greater in the unsupported arm exercise than in the supported arm exercise. <br><b>Conclusions</b>: The results of this study indicate that there is a greater possibility of developing dyspnea during an unsupported arm exercise than during a supported arm exercise, possibly because of the greater ventilatory demand in the former.

Journal

  • Physical Therapy Japan

    Physical Therapy Japan 39(5), 314-321, 2012

    Japanese Society of Physical Therapy

References:  24

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