PREDICTION OF STROKE VOLUME FROM OXYGEN PULSE MEASUREMENTS IN UNTRAINED AND TRAINED MEN
PREDICTION OF STROKE VOLUME FROM OXYGEN PULSE MEASUREMENTS IN UNTRAINED AND TRAINED MEN
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DOI：
10.1139/h94-003
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发表时间：
1994-03-01
期刊：
影响因子：
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通讯作者：
BELL, G
中科院分区：
文献类型：
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作者：
BHAMBHANI, Y;NORRIS, S;BELL, G
本研究探讨了未经训练（UG）和训练（TG）的男性在次极量周期运动中氧脉搏（O-2脉搏）与每搏输出量（SV）和动静脉氧差[（a-（v）over bar）O-2 diff]的关系。每组14名志愿者完成了最大摄氧量增量试验和60%最大摄氧量的次最大试验，以确定通过CO2再呼吸的心输出量（Q）。VO 2、Q和心率（HR）用于计算SV和（a-（v）/bar）O-2 diff。在次极量运动期间，两组之间的O-2脉搏、SV和（a-（v）over bar）O-2 diff无显著差异（p > 0.05）。TG组的每搏输出量指数（SVI）显著高于TG组（p <0.05）。在两组中，O-2脉搏与SV和SVI显著相关（p <0.05），但与（a-（v）超过bar）O-2差异无关。用氧脉搏预测每搏输出量的回归方程分别为：Y = 6.81X + 26.7，SE = 21.4，r = 0.84; Y = 10.33X - 32.3，SE = 14.2，r = 0.71。这些结果表明，O-2脉冲可以用来预测SV在次极量周期运动在未经训练和训练的男子。
This study examined the relationship of oxygen pulse (O-2 pulse) to stroke volume (SV) and arterio-venous oxygen difference [(a-(v) over bar)O-2 diff] during submaximal cycle exercise in untrained (UG) and trained (TG) males. Fourteen volunteers in each group completed an incremental VO2 max test and a submaximal test at 60% VO2 max to determine cardiac output (Q) via CO2 rebreathing. VO2, Q, and heart rate (HR) were used to calculate SV and (a-(v) over bar)O-2 diff. There were no significant differences (p > .05) between the two groups for O-2 pulse, SV, and (a-(v) over bar)O-2 diff during submaximal exercise. Stroke volume index (SVI) was significantly higher (p < .05) in the TG. O-2 pulse was significantly related to SV and SVI (p < .05) bur not to (a-(v) over bar)O-2 diff in both groups. Regression equations for predicting SV from O-2 pulse for UG and TG were Y = 6.81X + 26.7, SE = 21.4, r = 0.84, and Y = 10.33X - 32.3, SE = 14.2, r = 0.71, respectively. These results suggest that O-2 pulse can be used to predict SV during submaximal cycle exercise in untrained and trained men.