论文部分内容阅读
目的综合评价蒙古族青少年生长发育状况,为探讨少数民族学生体质科学的评价方法提供参考。方法采用主成分分析,对通辽市7~18岁蒙古族6 607名青少年生长发育的身高、坐高、体重、胸围、腰围、臀围、上臂部皮褶厚度、肩胛部皮褶厚度、腹部皮褶厚度、脉搏、收缩压、舒张压、肺活量、握力、坐位体前屈、立定跳远、引体向上、50 m跑、800 m跑等19个指标进行综合评价。结果蒙古族青少年生长发育指标特征根λ>1的4个主成分累积贡献率达到67.312%,被确定为重要主成分,建立主成分函数表达式。19个生长发育指标可以用形态发育因子、体脂含量肥胖因子、功能状况因子和体育素质因子4个主成分来概括。结论运用主成分分析可以消除原始变量间的信息重叠,合理地综合评价蒙古族青少年的生长发育状况。
Objective To comprehensively evaluate the growth and development status of Mongolian adolescents and to provide reference for the evaluation of minority students’ physique science. Methods Principal component analysis (PCA) was used to analyze the height, height, weight, chest circumference, waist circumference, hip circumference, skin thickness of upper arm, skinfold thickness of scapular, abdominal skin of 6,607 adolescents aged from 7 to 18 in Tongliao city. Pleat thickness, pulse, systolic pressure, diastolic pressure, vital capacity, grip strength, sitting flexion, standing long jump, pull up, 50 m run, 800 m run and other 19 indicators for comprehensive evaluation. Results The cumulative contribution rate of the four principal components of the Mongolian adolescent population with growth index of λ> 1 reached 67.312%, which was identified as an important principal component to establish the principal component function expression. Nineteen growth and development indexes can be summarized by four main components: morphological developmental factor, body fat content and obesity factor, functional status factor and sports quality factor. Conclusion The principal component analysis can eliminate the information overlap between the original variables and reasonably comprehensively evaluate the growth and development status of Mongolian adolescents.