Oueslati Ferid, Boone Jan, Ahmaidi Said
EA-3300: APERE, Department of Sport Sciences, University of Picardie Jules Verne, Amiens, France.
Department of Movement and Sports Sciences, Ghent University, Ghent, Belgium.
Respir Physiol Neurobiol. 2016 Jun 15;227:41-7. doi: 10.1016/j.resp.2016.02.008. Epub 2016 Feb 23.
The purpose of this study was to investigate the relationships between respiratory muscle endurance, tissue oxygen saturation index dynamics of leg muscle (TSI) and the time to exhaustion (TTE) during high intensity exercise. Eleven males performed a respiratory muscle endurance test, a maximal incremental running field test (8 km h(-1)+0.5 km h(-1) each 60s) and a high-intensity constant speed field test at 90% VO2max. The TSI in vastus lateralis was monitored with near-infrared spectroscopy. The TSI remained steady between 20 and 80% of TTE. Between 80 and 100% of TTE (7.5 ± 6.1%, p<0.05), a significant drop in TSI concomitant with a minute ventilation increase (16 ± 10 l min(-1)) was observed. Moreover, the increase of ventilation was correlated to the drop in TSI (r=0.70, p<0.05). Additionally, respiratory muscle endurance was significantly correlated to TSI time plateau (20-80% TTE) (r=0.83, p<0.05) and to TTE (r=0.95, p<0.001). The results of the present study show that the tissue oxygen saturation plateau might be affected by ventilatory work and that respiratory muscle endurance could be considered as a determinant of performance during heavy exercise.
本研究的目的是调查高强度运动期间呼吸肌耐力、腿部肌肉组织氧饱和度指数动态（TSI）与运动至疲劳时间（TTE）之间的关系。11名男性进行了呼吸肌耐力测试、最大递增跑步场地测试（每60秒速度增加8 km h(-1)+0.5 km h(-1)）以及在90%最大摄氧量下的高强度恒速场地测试。使用近红外光谱法监测股外侧肌的TSI。TSI在TTE的20%至80%之间保持稳定。在TTE的80%至100%之间（7.5±6.1%，p<0.05），观察到TSI显著下降，同时分钟通气量增加（16±10 l min(-1)）。此外，通气量的增加与TSI的下降相关（r=0.70，p<0.05）。另外，呼吸肌耐力与TSI时间平台期（TTE的20%至80%）显著相关（r=0.83，p<0.05），与TTE也显著相关（r=0.95，p<0.001）。本研究结果表明，组织氧饱和度平台期可能受通气功影响，呼吸肌耐力可被视为剧烈运动期间运动表现的一个决定因素。
