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Abstract.To study the physical function status of 7-12 years old Li nationality students,the work begins with two kinds of comparison,one is about Li nationality students' physical function in different years,the other is about the comparison of Li nationality students with national Han nationality students,the comparison indexes about pulse,SBP,DBP,vital capacity,etc.The investigate time is 1985,1995,2000,2005,2010,etc.With the comparison of the average level of physical function,find that Li nationality students' physical function has a tendency of descend to recovery,but the resting heart rate,DBP are lasting increase.In the comparison of different nationality students,the Li nationality students' performance is not good,neither in pulse,nor in blood pressure,and even in vital capacity.In the mainly time,Li nationality students is higher in pulse,and lower in blood pressure(SBP/DBP) and vital capacity.but to make anyone consolation is,that the gap between them is changing into small,except the pulse.So the society should take a persistent concern in Li nationality students' nutrition,habitation and P.E to promote their physical function.

Abstract. To study the body shape status of 7-12 years old Li nationality students of China,with a comparison in body shape between Li nationality and national Han nationality students of China, select the average level of 7-12 years students' body shape as the comparative object, the research indexes includes 3 items,such as height,weight,and chest,etc.And the comparison periods is 1985-1995,1985-2000,1985-2005,and 1985-2010,etc.Then find that,from the year 1985,the average of Li nationality students is lower than Han nationality in height,weight and chest.But in 1985,Li nationality students' level is higher than Han nationality students in height and chest.So the results means in 30years,Li nationality students' level is lower than Han nationality students' in body shape.and the gap is increasing gradually now.Perhaps the social and economic backwardness of Li nationality is the main reason.So,to improve the societyl and economic development of Li nationality,and to provide more nutrition to Li nationality students is the better way to reinforce their body structure.

Abstract. To study the health related physical fitness of Chinese Li nationality students of 7-18 years old, the work began with literature, survey, measurement and statistics, at last by independent samples T-test to compare the health related physical fitness of Chinese Li nationality students, there were three compare methods, first is a compare with the whole students of Li nationality, the second was concerned with the Li nationality school boys or Li nationality school girls, the third was concerned with the compare of gender. The results show that Li nationality students' health related physical fitness appears a decrease tendency in ten years, especially the pulse, the grip strength. The Li nationality school boys appear a rapid decrease than the girls, and the difference between gender changes into bigger in pulse and crook before the seat body. So, to improve the whole educational environment which surrounding these children, and to concern with their nutrition, habitation, and traditional nationality sports is the meaningful thing to do.

To study the body development of Chinese Li nationality students of 7-18 years old, with the work of literature, survey, measurement and computer statistics, at last by independent samples T-test to compare the body health factors of Chinese Li nationality students, there were three compare methods, first is a compare with the whole students of Li nationality, the second was concerned with the Li nationality school boys or Li nationality school girls, the third was concerned with the compare of gender. The result shows that, From2005 to 2015, in ten years, the Li nationality students' body have been changed much. First, the eyesight is better than before, the height and sitting height are higher, but the weight isn't more change than before, only the girls, the weight is increase. the more, the individual health environment is not good as ten years ago. To compare with the Li nationality students, in the height or in the weight, there are not big different now, only the sitting height of girls is always lower than boys, the Li nationality boy's trunk seems more slender than before. The whole society should remain a persistent concern in Li nationality students' life habitation, arrangement of spare time, and house education, which have an important influence at the body development of children. Research objects and methods Research Objects. The objects include 7-18 years old Li nationality students, which the general number is 12217, among them, the school boy is 6315, the school girl is 5902, and 4783 in 2005, 7434 in 2015. Research Methods. The main methods include literature, survey, measurement and statistics. And the measurement indexes are ascarid egg, eyesight, height, weight, and sitting height etc. In the comparison of data, the main comparison object is average level; the statistics is independent samples T-test. which the original data comes from 2005 Chinese government's opened reports of physical fitness and health research of Chinese school students or recently[1][2][3]. Results Body Changes of Li Nationality Students from 2005 to 2015. From2005 to 2015, 10 years after, the Li nationality students' body have been changed much. First, the eyesight is good than before, the height and sitting height are higher, but the weight is not apparent different than the last. Especially, the individual health habit is not good than ten years ago, for example, in 2005, the detection rate of ascarid egg is 12.65%, but in 2015, the rate is 14.92%, the rate rise for over two percent.