Sự phát triển một số chỉ số thể lực và sinh lý của học sinh dân tộc Dao lứa tuổi 12-15 tại tỉnh Yên Bái

Pandanus amaryllifolius, plant extract. Research the development of physical and physiological indicators at ages of the middle school students has an important role for the development of human resources in the future. With the aim of contributing to add the data needed for the physical and physiological developmentof children, as a scientific basis for giving solutions, enhancing the stature of Vietnam people in general and the ethnic minorities in particular, the authors do the research "Development of some physical and physiological indicators of Dao ethnic students ages 12-15 in Yen Bai province". Research objects are 480 middle school students, in Van Yen mountainous districts, Yen Bai province. The results showed that:The physical indicators such as height, weight, mean chest circle, the BMI, Pignet, and physiological indicators such as respiratory frequency, heart rate and blood pressure are developed with age, from 12 to 15 years old. But at the different ages, the indicators have developments with different speeds, expressing the stages clearly, especially the genderspecific of puberty stages at middle school students. The physical and physiological indicators of the Dao middle school students now are much improved than before.