A thermophysiological study on temperature regulation during exercise in children : based on their physical training

1.本研究的目的是比较儿童和大学生对运动时的体温调节反应，旨在探讨儿童在两种不同工作强度下对运动时的体温调节反应特征。5名健康男学生（11岁）和5名大学生（20岁）在热中性（25‰，相对湿度50%）条件下，在约30%和60%的最大摄氧量（VO_<2max>）下进行自行车运动。测量全身出汗率（SR）、直肠（T_<re>）、平均皮肤（T_<sk>）和平均体温（T_b）、摄氧量（VO_2）和心率（HR）。我们估计了休息和运动时的热平衡。在30%和60% VO_<2max>的运动中，儿童的SR明显低于成年男性。在两种工作条件下，儿童的HR、T_<re>和T_b均显著高于成年男性。作为产热指标的VO_2在成年男子和工作强度之间没有显著差异。在较高的工作强度下，与成年男性相比，在任何给定的T_<re>和T_b下，儿童的SR均较低。将T_b和T_<re>与运动时的SR进行对比，除SR与T_<sk>的相关性在儿童中不显著外，两组均呈显著正相关。协方差分析显示，儿童和成年男子在两种工作强度下的回归线截距有显著差异。数据显示，儿童和成年男性在运动过程中SR与T_b或T_<re>的关系呈平行移动（向右）。数据显示，在运动过程中，儿童的SR与T_b或T_< r>的关系呈平行移动（向右）。综上所述，儿童在较高工作强度下的运动散热能力与成年男性不同。我们正在考虑一项体育锻炼计划，为学龄前男孩少

1.The purpose of the present study was to compare the thermoregulatory responses to exercise of children with those of college students, aiming to examine the characteristics of thermoregulatory responses of children to exercise at two different work intensities, based on their physical exercise training.2.Five healthy school boys (11 years) and five college students (20 years) conducted bicycle exercise at work intensities of approximate 30 and 60% of maximal oxygen uptake (VO_<2max>) at thermoneutrality (25ﾟC with a relative humidity of 50%). Whole-body sweat rate (SR), rectal (T_<re>), mean skin (T_<sk>) and mean body (T_b) temperatures, oxygen uptake (VO_2), and heart rate (HR) were measured. We estimated heat balance at rest and during exercise.3.During exercise at 30 and 60% VO_<2max>, SR was significantly lower in children than in the adult men. HR,T_<re> and T_b were significantly higher in the children than in the adult men in both work conditions.4.There were no significant d … More ifferences in VO_2, as an index of heat production, in both adult men and work intensities. At higher work intensity, lower SR in children was observed at any given T_<re> and T_b, as compared with adult men.5.When T_b and T_<re> were plotted against SR during exercise, the positive significant correlations were found in both groups, except SR vs. T_<sk> relation which was not significant in children. Analysis co-variance revealed a significant difference of the intercept between the regression lines of children and adult men in both work intensities. The data showed that there was a parallel shift (rightward) in the SR to T_b or T_<re> relationship during exercise in children and adult men. The data showed that there was a parallel shift (rightward) in the SR to T_b or T_<re> relationship during exercise in the children.6.In conclusion, the children's ability to dissipate heat during exercise at higher work intensity is different from that of adult men. We are to consider a physical exercise planning for preadrescet school boys Less