Excessive sedentary time and low cardiorespiratory fitness in European adolescents: the HELENA study
Excessive sedentary time and low cardiorespiratory fitness in European adolescents: the HELENA study
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DOI：
10.1136/adc.2010.187161
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发表时间：
2011-03-01
影响因子：
5.2
通讯作者：
Sjostrom, Michael
中科院分区：
文献类型：
--
作者：
Martinez-Gomez, David;Ortega, Francisco B.;Sjostrom, Michael
本研究的目的是研究久坐时间与青少年低心肺适能（CRF）之间的关系，以及这种关系是否独立于身体活动。方法对来自欧洲10个城市的1808名12.5 ~ 17.5岁的青少年进行研究。用加速度计测量久坐时间和中高强度体力活动（MVPA）。CRF通过20米穿梭跑试验进行评估。根据FITNESSGRAM指南将青少年分为高/低两组。采用受试者工作特征（ROC）分析确定区分青少年高和低CRF的最佳阈值。结果青春期女孩的久坐时间比男孩多（p= 69%），久坐活动醒着时间的CRF低，但男孩的CRF高与低之间没有显著的阈值区分。超过这个阈值的青春期女孩的CRF水平较低（p = 60分钟/天MVPA）。结论久坐时间过长与青春期女孩的低CRF有关，而与青春期男孩无关。然而，如果青春期女孩符合目前的体育活动指南，这种不利影响可能会减弱。
Background The aims of this study were to examine what amount of sedentary time is associated with low cardiorespiratory fitness (CRF) in adolescents and whether this association is independent of physical activity.Methods The study comprised 1808 adolescents aged 12.5-17.5 years from 10 European cities. Sedentary time and moderate-to-vigorous physical activity (MVPA) were measured by accelerometer. CRF was assessed by the 20 m shuttle-run test. Adolescents were divided into two groups (high/low) according to FITNESSGRAM guidelines. Receiver-operating characteristic (ROC) analysis was used to determine thresholds that best discriminate between high and low CRF in adolescents.Results Adolescent girls had more sedentary time than boys (p= 69% of waking time in sedentary activities had low CRF, but no significant threshold discriminated between high and low CRF in boys. Adolescent girls who exceeded this threshold had lower levels of CRF (p = 60 min/day in MVPA).Conclusion Excessive sedentary time is associated with low CRF in adolescent girls but not in boys. However, this adverse effect might be attenuated if adolescent girls meet the current physical activity guidelines.