Children’s Weightlifting Athletes Body Shape Evaluation And Grey Correlation Analysis Of Performance

The body shape as a weightlifting athletes selecting one of the important indexes in children and adolescents, determine the future development and performance of the athletes is important influence factor. Therefore, through the literature material method, Delphi method, questionnaire survey method, mathematical statistics and measurement method, determines the children’s weightlifting athletes body shape evaluation index system, build the children’s weightlifting athletes body shape evaluation model, and the index weight at all levels, at the same time, they pick some children weightlifting athletes, for example, on the body shape characteristics of male and female athletes are compared, and the difference in the end, based on the grey system theory, the children’s weightlifting athletes body shape index and performance has carried on the research and exploration of grey correlation, affect children’s weightlifting athletes performance to find out the body shape index, excavated measure of correlation degree is higher, with scientific evaluation of children’s weightlifting athletes body shape, instruction selection, improve the level of China’s weightlifting competition. The main research conclusions are as follows:(1) children lifter body form primary primitive indexes,31,26 derived indicators, through expert a screening and secondary screening, finally filtering result is:the children swimming athletes body shape evaluation index of original13; Nine derived indicators.(2) children weightlifting athletes body shape evaluation theory conception model is:the primary evaluation index for the original indexes and the two derived indicators, the secondary six evaluation indexes including the length of the index; Body shape to our institute screening suitability Test index through factor analysis, through the KMO and Bartlett’s Test of spherical, according to the results of Test and KMO Test the sample for factor analysis; During the analysis on the factors of load, the maximum variation coefficient method of orthogonal rotation (varimax), of the rotating factor loading matrix obtained as a result, the eigenvalues of the six secondary evaluation index were greater than1, the sum of the contribution rate of85.684%, contains most of the children’s weightlifting athletes body shape information, other aspects of body shape factor variance less affected.(3) the level of evaluation index weight calculation results, the original index of0.58,0.42derived index; The length of the secondary evaluation index index, surrounded degree index, the width of the index, enrichment degree index, body composition and body weight coefficient of indicators were0.302,0.151,0.116,0.114,0.077and0.229.(4) the children in the male, the female weightlifting athletes body shape characteristics, to the male, the female weightlifting athletes body shape primitive and derived indicators compared the differences as a result, the body form derived indicators, in the comparison of the overworked, index, Mr Index, body fat percentage, chest/height x100x100and sitting height/height several indexes statistically significant differences, at the same time, that there was a strong correlation between the variables have high coincidence. In addition, overworked, index, Mr Index showed that male weightlifting athletes body enrichment degree, and the body tissue density were higher than female athletes, and weightlifting athletes fall within the scope of normal weight.(5) children weightlifting athletes body shape and performance of grey correlation sort of size, height, chest circumference>> g Mr Index> upper limb length> upper extremity length/height x100x100> bust/height.