Tracking of physical activity and aerobic power from childhood through adolescence
Tracking of physical activity and aerobic power from childhood through adolescence
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DOI：
10.1249/01.mss.0000093612.59984.0e
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发表时间：
2003-11-01
期刊：
影响因子：
--
通讯作者：
Hu, JH
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文献类型：
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作者：
McMurray, RG;Harrell, JS;Hu, JH
目的：评估非裔美国人（AA）和高加索人（CA） 8至16岁青少年的身体活动水平（PA）和有氧能力（VO2max）的跟踪情况。方法：研究对象为529名女孩和535名男孩，他们在7年内至少获得三次数据，以及387名女孩和404名男孩，他们参加了所有年份。PA水平是通过调查得出的。VO2max是通过循环测功仪测试预测的。结果：AA男孩和女孩1-7年VO2max的Spearman相关性相似（p相似于0.53）。1-7年级CA男孩和女孩的VO2max相关性相似（p相似于0.50-0.53）。2-7年级AA女生和CA女生的PA相关性相似，但AA女生的PA相关性高于CA男生。VO2max的kappa (K)统计表明，在分类（高、中、低）上有很大的一致性，AA女生的一致性最高，AA男生的一致性最低。无论是哪个种族的女孩，高、中、低PA组的K统计数据都相当低，而男孩的K统计数据则稍好一些。跟踪VO2max的一般估计方程（GEE）稳定性系数在性别和种族之间相似（P < 0.0001）。男孩PA的GEE稳定系数好于女孩，AA略好于CA。结论：虽然有氧能力和身体活动水平从童年到青春期下降，但有氧能力比身体活动水平更好。因为对队列的跟踪只是适度的，如果我们对这些年轻人进行早期干预，改变是可能的。
Purpose: To evaluate the tracking of physical activity levels (PA) and aerobic power (VO2max) in African-American (AA) and Caucasian (CA) youth as they age from 8 to 16 yr. Methods: Subjects were 529 girls and 535 boys for whom data were obtained at least three times over 7 yr and a subset of 387 girls and 404 boys who participated in all years. PA levels were obtained from a survey. VO2max was predicted from a cycle ergometer test. Results: Spearman correlation for VO2max for years 1-7 for AA boys and girls were similar (p similar to 0.53). Year 1-7 correlations for VO2max for the CA boys and girls were similar (p similar to 0.50-0.53). The year 2-7 correlations for PA were similar for the AA and CA girls but higher for the AA than the CA boys. The kappa (K) statistics for VO2max indicated substantial year-to-year agreement on categorization (high, moderate, and low), with AA girls having the highest agreement and AA boys the lowest. The K statistic for high, moderate, and low PA groupings in girls of either ethnicity was quite low, whereas the K statistics for the boys were somewhat better. The general estimating equation (GEE) stability coefficients for tracking of VO2max were similar between the sexes and ethnicities (P < 0.0001). The GEE stability coefficient for PA was better for the boys than girls and slightly better for the AA than CA. Conclusion: Although aerobic power and physical activity levels decline from childhood through adolescence, aerobic power tracks better than physical activity levels. Because tracking within the cohort is only moderate, change is possible if we intervene early in these youth.