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

本研究的目的是在体力训练的基础上，比较儿童和大学生对运动的体温调节反应，以了解儿童对两种不同工作强度运动的体温调节反应的特点。2.对5名健康男生(11岁)和5名大学生(20岁)进行自行车运动，工作强度约为最大摄氧量(VO&lt；2max&gt；)的30%和60%，在中等温差(25ﾟC，相对湿度50%)下进行自行车运动。测定全身出汗率(SR)、直肠出汗率(T&lt；Re&gt；)、平均皮肤(T&lt；SK&gt；)和平均体温(Tb)、摄氧量(VO2)和心率(HR)。在两种工作条件下，儿童的HR、T&lt；Re&gt；和T_b均显著高于成年男性。4.无显著的d…作为产热指标的VO_2在成年男性和作业强度上差异较大。在较高的运动强度下，与成年男性相比，儿童在任何给定的T_t；Re&Gt；和T_b处的SR都较低。5.当T_b和T_t；Re&gt；与运动中的SR作图时，两组均呈显著正相关，但SR与T&lt；SK&Gt；关系在儿童中不显著。协方差分析表明，儿童和成年男性在两种工作强度下的回归线截距有显著差异。结果表明，儿童运动过程中SR与T_b或T_t；Re&gt；关系呈平行右移。6.综上所述，儿童高强度运动时的散热能力不同于成年男性。我们将较少考虑学龄前男生的体育锻炼计划。

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