摘要
目的：观察青年男性在湿热环境运动中心率（HR）、心率变异性（HRV）、核心温度（Tc）、额温（Tf）的变化,探讨并建立青年男性湿热环境运动中Tc的预测公式。方法：选取非体育专业大学生21名,在温度36.0℃、相对湿度60.0%的环境下完成运动平板实验,初始以40%-50%VO2max的强度（≈6.4 km/h的速度）运动20 min,而后增加强度至60%VO2max的强度（≈9.6 km/h的速度）运动至力竭。在运动过程中实时监测受试者的HR、HRV、Tc、Tf,并在运动前后对受试者的体重进行测量。结果：受试者在运动（29.7±3.8）min后达到力竭,力竭时刻HR达到（201±10）次/min;Tc达到（39.1±0.3）℃;Tf到达（39.6±0.7）℃;体重丢失达到（590±512）g。运动过程中HR、Tc、Tf显著升高（P〈0.05）,HRV的时域指标STD、RMSSD、RRindex显著下降（P〈0.05）。回归分析显示,HR为良好的Tc预测指标,预测公式为Tc=39.17-0.02·HR-4·HR2（r2=0.969;P=0.001）或Tc=0.02·HR＋34.66（r2=0.977;P=0.001）。此外,还发现HR是预测5 min后Tf值的良好指标（r2=0.974;P=0.006）。结论：青年男性在湿热环境下进行先低等强度后中等强度的运动时,可以运用HR对机体的Tc进行预测,以预防热疾病的发生。
Objective： The aim of this study was to establish an equation to predict core temperature of young menduring exercise in a hot and humid environment by observing the changes of heart rate （HR） , heart rate variability（HRV） , core temperature （Tc ） , forehead temperature （Tf） in this special Situation. Methods： Twenty-one non-athlete students （ mean age 19.1 ± 0.3 yrs, height 177.9 ± 4.8 cm, weight 67.4 ± 7.1 kg, VO2max 3.7 ± 0.4 L/min） participated in the study. HR, HRV, Tc and Tf were recorded during exercise （jogging 20 min at 40%-50% VO2m （ 6.4 krnfh） , then jogging at about 60% VO2max （ -9.6 km/h） and continues to exhaustion） in anenvironment with 36.0℃, 60.0% relative humidity （RH）. And people＇s weight was measured at pre- and post-exercise. Results： Subjects were exhausted after 29.7 ± 3.8 min, at the same time, their HR was 201 ± 10beats/min, Tc was 39.1 ±0.3 ℃ , Tf was 39.6 ±0.7℃ , weight loss was 590 ±512 g. During exercise, HR, Tcand Tf increased （Ps 〈 0.05） , and STD, RMSSD and RR （ HRV indexes） decreased （Ps 〈 0.05）. By regres-sion analysis, we found that HR is a good indicator to predict To, and the prediction equation is T = 39.17 -0.02 · HR -4 HR2（r2 = 0.969; P= 0.001） or To = 0.02 · HR ＋ 34.66 （r2 =0.977; P = 0.001）. Alsowe found that HR is a good indicator to predict Tr of the next 5 minutes （ r2 = 0. 0974 ; P = 0. 006） under thissituation. Conclusion ： HR is a good indicator to predict the Tc of young men during light -moderate intensity exer-cise for heat-illness prevention.
出处
《北京体育大学学报》
CSSCI
北大核心
2015年第10期63-69,共7页
Journal of Beijing Sport University
基金
国家科技支撑计划项目(编号:2012BAK21B03)
2014国家大学生创新创业训练计划项目
关键词
湿热环境
核心温度
心率
力竭运动
热疾病
hot and humid environment
core temperature
heart rate
exhausted exercise
heat-illness
