Malina Robert M, Morano Peter J, Barron Mary, Miller Susan J, Cumming Sean P
Tarleton State University, Stephenville, TX, USA.
Clin J Sport Med. 2005 May;15(3):125-32. doi: 10.1097/01.jsm.0000164287.42066.63.
To characterize the growth status of participants in community-sponsored youth football programs and to estimate rates of growth in height and weight.
Mixed-longitudinal over 2 seasons.
Two communities in central Michigan.
Members of 33 youth football teams in 2 central Michigan communities in the 2000 and 2001 seasons (Mid-Michigan PONY Football League).
Height and weight of all participants were measured prior to each season, 327 in 2000 and 326 in 2001 (n = 653). The body mass index (kg/m) was calculated. Heights and weights did not differ from season to season and between the communities; the data were pooled and treated cross-sectionally. Increments of growth in height and weight were estimated for 166 boys with 2 measurements approximately 1 year apart to provide an estimate of growth rate.
Growth status (size-attained) of youth football players relative to reference data (CDC) for American boys and estimated growth rate relative to reference values from 2 longitudinal studies of American boys.
Median heights of youth football players approximate the 75th percentiles, while median weights approximate the 75th percentiles through 11 years and then drift toward the 90th percentiles of the reference. Median body mass indexes of youth football players fluctuate about the 85th percentiles of the reference. Estimated growth rates in height approximate the reference and may suggest earlier maturation, while estimated growth rates in weight exceed the reference.
Youth football players are taller and especially heavier than reference values for American boys. Estimated rates of growth in height approximate medians for American boys and suggest earlier maturation. Estimated rates of growth in weight exceed those of the reference and may place many youth football players at risk for overweight/obesity, which in turn may be a risk factor for injury.
描述社区赞助的青少年足球项目参与者的生长状况，并估算身高和体重的增长率。
两个赛季的混合纵向研究。
密歇根州中部的两个社区。
2000年和2001赛季密歇根州中部两个社区33支青少年足球队的队员（中密歇根小马足球联盟）。
在每个赛季开始前测量所有参与者的身高和体重，2000年有327人，2001年有326人（n = 653）。计算体重指数（kg/m）。各赛季之间以及不同社区之间的身高和体重没有差异；数据进行合并并进行横断面分析。对166名男孩进行了大约相隔1年的两次测量，以估算身高和体重的增长增量，从而得出增长率的估计值。
青少年足球运动员相对于美国男孩参考数据（疾病控制与预防中心）的生长状况（已达到的身材大小），以及相对于两项美国男孩纵向研究参考值的估计增长率。
青少年足球运动员的身高中位数接近第75百分位数，而体重中位数在11岁之前接近第75百分位数，之后向参考值的第90百分位数偏移。青少年足球运动员的体重指数中位数在参考值的第85百分位数左右波动。身高的估计增长率接近参考值，可能表明早熟，而体重的估计增长率超过参考值。
青少年足球运动员比美国男孩的参考值更高，尤其是更重。身高的估计增长率接近美国男孩的中位数，表明早熟。体重的估计增长率超过参考值，这可能使许多青少年足球运动员面临超重/肥胖风险，而超重/肥胖反过来可能是受伤的风险因素。
