摘要:
分析中国汉族7~18岁儿童青少年体质量指数(BMI)和20m往返跑(20 m SRT)的相关性,为促进不同营养状况儿童青少年的体质健康提供科学依据.方法 在中国各行政区(华东、华北、中南、西北、西南和东北)采用随机个案法抽取17 280名7-18岁汉族儿童青少年作为研究对象,运用20 m SRT进行心肺耐力水平测试,并采用单因素方差分析、线性回归等方法探讨BMI和20 m SRT之间的相关性.结果 中国汉族男性儿童青少年20 m SRT总体成绩消瘦、正常、超重和肥胖组分别为32.20,35.23,28.84和22.29次,女生分别为25.22,26.13,23.36和18.39次,男女生成绩均为正常组>消瘦组>超重组>肥胖组(P值均<0.05).BMI-Z分范围是-3.0~8.0,无论男女,不同BMI-Z分组青少年的20 m SRT-Z分差异均具有统计学意义(P值均<0.01).无论男女,BMI-Z分在接近正常范围区间,20 m SRT-Z较高;而在较高和较低区间时,20 m SRT-Z较低.结论 体重正常组汉族儿童青少年心肺耐力水平高于消瘦、超重和肥胖组,BMI-Z分和20m SRT-Z分之间大体呈“抛物线”变化趋势.
Abstract:
Objective To explore the relationship between BMI and 20-meter shuttle run (20 m SRT) of children and adolescents aged 7-18 of Han nationality,and to provide scientific basis for promoting the physical health of children and adolescents with different nutritional status in Han ethnicity.Methods In the administrative regions (East China,North China,South Central China,Northwest China,Southwest China and Northeast China),17 280 children and adolescents aged 7-18 of Han nationality were randomly selected by using the random case method.Cardiorespiratory fitness was estimated by using the 20 m SRT,and single factor analysis of variance,linear regression were used to analyze and explore the relationship between BMI and 20 m SRT.Results For boys,the overall 20 m SRT performance of wasting,normal weight,overweight and obese group were 32.20,35.23,28.84 and 22.29 laps,respectively.And for girls,they were 25.22,26.13,23.36 and 18.39 laps,respectively.For Boys and girls,the group of normal weight achieved the best,followed by wasting group,overweight group and obesity group(P<0.05).The BMI-Z range was -3.0-8.0,and regardless of sex,the differences of 20 m SRT-Z scores between BMI-Z groups were statistically significant(P< 0.01);In both sexes,BMI-Z score was close to normal range,20 m SRT-Z score was higher,while 20 m SRT-Z score was lower in higher and lower BMI-Z score range.Conclusion Cardiopulmonary fitness level of the normal weight group among Chinese children and adolescents are higher than that of wasting,overweight and obesity group,respectively;and it showed a "parabolic" trend between BMI-Z and 20 m SRT-Z.
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