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的体温调节反应，探讨儿童在两种不同运动强度下的体温调节反应特点，根据他们的体育锻炼训练。2.五个健康的男生（11岁）和5名大学生（20岁）在热中性（25 ℃，相对湿度50%）条件下，以最大摄氧量（VO_）的30%和60%的强度进行自行车运动<2max>。测量全身出汗率（SR）、直肠温度（T_<re>）、平均皮肤温度（T_<sk>）和平均体温（T_B）、摄氧量（VO_2）和心率（HR）。3.在30%和60%VO_2运动时，<2max>儿童SR显著低于成年男性。儿童组HR、T_<re>（1/2）、T_（B）均显著高于成人组 关于我们 以VO_2作为产热指标，在成年男性和劳动强度中的差异。5<re>.将运动中的T_B和T_B<re>与SR作图，除SR与T_b<sk>关系在儿童中不显著外，其余两组均呈正相关。协方差分析显示，儿童和成年男子在两种工作强度的回归线之间的截距有显着差异。结果表明，运动时，儿童和成年男子的SR与T_（B）或T_（1）的关系均存在平行移动<re>。结果表明，儿童运动时SR与T_（B）或T_（1）的关系存在平行移动<re>。6.儿童在高强度运动时的散热能力与成年男性不同。我们要考虑体育锻炼规划preadrescet学校男生减

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