Department of Rehabilitation, Ibaraki Prefectural Central Hospital, Kasama-city, Ibaraki, Japan; Graduate School of Health Science, Ibaraki Prefectural University of Health Sciences, Ami, Ibaraki, Japan.
Graduate School of Health Science, Ibaraki Prefectural University of Health Sciences, Ami, Ibaraki, Japan; Department of Physical Therapy, Ibaraki Prefectural University of Health Sciences, Ami, Ibaraki, Japan.
J Bodyw Mov Ther. 2021 Oct;28:317-322. doi: 10.1016/j.jbmt.2021.06.007. Epub 2021 Jun 12.
Respiratory muscle oxygen consumption increases with the work of breathing. We hypothesized that reducing excessive respiratory muscle activity during exercise may improve exercise tolerance.
We developed a device to provide real-time visual feedback of thoracoabdominal movement and used it to examine the influence of visual feedback of thoracoabdominal movement during diaphragmatic breathing on oxygen consumption in eight healthy men. While sitting on a wheelchair with the backrest reclined at 60°, oxygen consumption per body weight (VO/BW), minute ventilation (VE), tidal volume (VT), and breathing frequency (fR) were measured, breath-by-breath, using an expired-gas analyzer. The breathing pattern was analyzed by inductance plethysmography, with transducer bands over the chest and abdomen recording thoracoabdominal movements.
There was no significant difference in RatioTH-ABD and the ventilatory parameters between diaphragmatic breathing and diaphragmatic breathing with visual feedback. The average VO/BW during diaphragmatic breathing with visual feedback was 0.6 ml/kg lower than that during diaphragmatic breathing without visual feedback (p<0.05).
When visual feedback was used during diaphragmatic breathing, the RatioTH-ABD remained essentially unchanged, but VO/BW decreased significantly. This suggests that visual feedback of thoracoabdominal movement during diaphragmatic breathing may reduce respiratory muscle oxygen consumption.
呼吸肌的耗氧量随呼吸功的增加而增加。我们假设，减少运动期间过度的呼吸肌活动可能会提高运动耐量。
我们开发了一种提供实时胸腹部运动视觉反馈的设备，并使用该设备检查在膈肌呼吸期间提供胸腹部运动视觉反馈对 8 名健康男性的耗氧量的影响。当坐在靠背向后倾斜 60°的轮椅上时，使用呼出气体分析仪逐次测量身体重量（VO/BW）、分钟通气量（VE）、潮气量（VT）和呼吸频率（fR）。通过电感测径术分析呼吸模式，在胸部和腹部上带有换能器带，记录胸腹部运动。
膈肌呼吸和带有视觉反馈的膈肌呼吸之间的 RatioTH-ABD 和通气参数没有显著差异。带有视觉反馈的膈肌呼吸时的平均 VO/BW 比没有视觉反馈时的膈肌呼吸低 0.6 ml/kg（p<0.05）。
当在膈肌呼吸期间使用视觉反馈时，RatioTH-ABD 基本保持不变，但 VO/BW 显著降低。这表明，在膈肌呼吸期间提供胸腹部运动的视觉反馈可能会降低呼吸肌的耗氧量。
