Pate R R, Baranowski T, Dowda M, Trost S G
Department of Exercise Science, University of South Carolina, Columbia 29208, USA.
Med Sci Sports Exerc. 1996 Jan;28(1):92-6. doi: 10.1097/00005768-199601000-00019.
The purpose of this study was to determine whether physical activity behavior tracks during early childhood. Forty-seven children (22 males, 25 females) aged 3-4 yr at the beginning of the study were followed over a 3-yr period. Heart rates were measured at least 2 and up to 4 d.yr-1 with a Quantum XL Telemetry heart rate monitor. Physical activity was quantified as the percentage of observed minutes between 3:00 and 6:00 p.m. during which heart rate was 50% or more above individual resting heart rate (PAHR-50 Index). Tracking of physical activity was analyzed using Pearson and Spearman correlations. Yearly PAHR-50 index tertiles were created and examined for percent agreement and Cohen's kappa. Repeated measures ANOVA was used to calculate the intraclass correlation coefficient across the 3 yr of the study. Spearman rank order correlations ranged from 0.57 to 0.66 (P < 0.0001). Percent agreement ranged from 49% to 62%. The intraclass R for the 3 yr was 0.81. It was concluded that physical activity behavior tends to track during early childhood.
本研究的目的是确定幼儿期的身体活动行为是否具有追踪性。研究开始时，对47名3 - 4岁的儿童（22名男性，25名女性）进行了为期3年的跟踪。使用Quantum XL遥测心率监测仪，每年至少测量2天、最多测量4天的心率。身体活动被量化为下午3点至6点期间观察到的心率比个体静息心率高出50%或更多的分钟数占比（PAHR - 50指数）。使用Pearson和Spearman相关性分析身体活动的追踪情况。创建了每年的PAHR - 50指数三分位数，并检查其一致百分比和Cohen's kappa。使用重复测量方差分析计算研究3年期间的组内相关系数。Spearman等级相关性范围为0.57至0.66（P < 0.0001）。一致百分比范围为49%至62%。3年的组内R为0.81。得出的结论是，幼儿期的身体活动行为往往具有追踪性。
