摘要
目的：探讨世居3500m高原13～18岁中学生乳酸阈心率（LTHR）特征，为高原地区中学生体育锻炼时运动强度的控制和进一步探索高原地区居民运动生理特征提供实验依据。方法：以96名世居于帕米尔高原（3500m）上的正常中学生为研究对象，在运动场上，采用5级递增强度跑的方法，对其LTHR进行测定。结果：1）高原地区中学生乳酸阈（LT）随年龄增长而升高，其中，初中生LT平均为2．11mmol／L，高中生为2．49mmol／L，明显低于4mmol／L的通用LT水平；2）高原地区13～18岁中学生LTHR为59％～73％HRmax，其中，中学生为59％～68％HRmax，高中生为63％～73％HRmax，低于国内、外学者推荐的标准。结论：高原地区中学生具有特殊的LT形成机制，实验结果可进一步揭示高原地区中学生生理机能和能量代谢的规律，所测得的LTHR能为高原地区各级中学体育教学和学生体育锻炼等运动处方中运动强度的控制提供抽样调查依据。
Objective：To provide some ideas for controlling the intensity of physical training of middle school students and further exploring physiological characteristics of residents in exercise on plateau by exploring the features of lactate threshold heart rate of 13 - 18 years old n ative students on 3 500 m plateau. Methods： 96 normal school students who are native in Pamirs （3 500 m） are taken as the research object. They are asked to experience race with 5 lev els of intensity and then their lactate threshold heart rates is measured. Results.- 1 ） the lactate threshold of middle school students on plateau increase with growth of age, specifically, that of junior student averages about 2.11mmol / L, and that of senior student about 2.49 mmol / L,significantly lower than the general lactate threshold level of 4 mmol/L. 2） the lactate threshold heart rate of middle school students 13 to 18 years old on plateau is 59% -73% HRmax,in which that of junior student students is 59%-68% HRmax, and that of senior student is 63 % - 73% HRmax, lower than the standard recommended by domestic and foreign scholars. Conclusion： Students on plateau have special plateau formation mechanism of lactate threshold. In addition, their physiological function and the law of energy metabolism are further revealed, and the measured values for lactate threshold heart rate provide scientific evidence of controlling exercise intensity of physical education and physical activity in middle school.
出处
《中国体育科技》
CSSCI
北大核心
2014年第4期102-107,共6页
China Sport Science and Technology
关键词
高原
中学生
乳酸阈心率
实验研究
plateau
middle school students
LTHR
experimental study
