A 3-year longitudinal analysis of changes in fitness, physical activity, fatness and screen time
A 3-year longitudinal analysis of changes in fitness, physical activity, fatness and screen time
复制标题
DOI：
10.1111/j.1651-2227.2009.01536.x
复制
发表时间：
2010-01-01
期刊：
影响因子：
3.8
通讯作者：
Mota, J.
中科院分区：
文献类型：
--
作者：
Aires, L.;Andersen, L. B.;Mota, J.
目的：分析体力活动指数（PAI）、屏幕使用时间（ST：电视、电脑）和体重指数（BMI）的变化是否对儿童和青少年的健康状况纵向变化有影响。此外，我们还分析了基线健康水平与健康状况变化之间的相互作用。
方法：这是一项对345名11 - 19岁高中生进行的为期3年的纵向研究。学生们进行了来自“健康体能测试”（Fitnessgram）的仰卧起坐、俯卧撑和20米往返跑测试。体力活动（PA）和屏幕使用时间（ST）通过标准问卷进行评估。健康测试的标准分数进行了求和。随时间的变化计算为Δ(1)（2007年减去2006年）、Δ(2)（2008年减去2007年）和Δ(3)（2008年减去2006年）。
结果：在Δ(1)、Δ(2)和Δ(3)中，PAI的变化与健康状况的变化呈正相关且独立相关。在Δ(3)中，BMI的变化与健康状况的变化呈负相关。与基线时健康状况较差的参与者相比，基线时健康状况良好的参与者在Δ(3)期间PAI呈正向变化，ST的变化减少，且3年内BMI的增长最低。
结论：3年内BMI的变化与健康状况的变化相关。然而，在青少年中，PAI的变化是每年以及3年评估期间健康状况变化的最佳预测指标。
Aim:To analyse whether changes in physical activity index (PAI), screen time (ST: television, computer) and body mass index (BMI) made a contribution to longitudinal changes in fitness of children and adolescents. Additionally, we analysed the interaction between baseline fitness level and changes in fitness.Methods:This is a 3-year longitudinal study of 345 high school students aged 11-19 years. Students performed curl-ups, push-ups and 20-m shuttle run tests from Fitnessgram. PA and ST were evaluated using a standard questionnaire. Standardized scores of fitness tests were summed. Changes over time were calculated as Delta(1) (2007 minus 2006), Delta(2) (2008 minus 2007) and Delta(3) (2008 minus 2006).Results:Changes in PAI were positively and independently associated with changes in fitness in Delta(1), Delta(2) and Delta(3). Changes in BMI were negatively associated with changes in fitness in Delta(3). Participants highly fit at baseline were those who showed positive changes in PAI over Delta(3), decreased changes in ST and had the lowest increase in BMI over 3 years compared with those low-fit at baseline.Conclusions:Changes in BMI were associated with changes in fitness over 3 years. However, changes in PAI were the best predictor for changes in fitness in each year and over the 3 years of evaluation in youth.