大学生热环境下中等强度运动中的热调节反应和生理变化

Objective: The study program observes dynamic changes of heart rate(HR), rating of perceived exertion (RPE), and Rctal Temperature(Tre. )during moderate exercises. Also, Body weight loss, sweat loss rate and sweat loss volume were measured before and after exercise. Methods: 18 male volunteers undergraduate were randomly assign into experiment and control groups. The two groups require to perform 60min cycling exercise in either heat environment(38±1℃) or normal environment(26±1℃) by 55%VO2max intensity and 73% relative humidity. Resulets: There’s no significant difference of HR, RPE between two groups in the initial stages. However, all of that were changed when prolonging exercise time. Markers of experiment which include body-weight loss, sweat loss rate, fatigue index, and blood urea are significant different from the control group. Conclusion: Thers’s little effect on these physiological markers during short-term exercise, but significant differences were observed while prolonging the exercise time. And this changes which abnormality caused by heat enviroment is harmful to human’s health.