Postgraduate Program in Epidemiology, Federal University of Pelotas, Brazil; School of Human Movement and Nutrition Sciences, University of Queensland, Brisbane, Australia.
School of Human Movement and Nutrition Sciences, University of Queensland, Brisbane, Australia.
Prev Med. 2019 Feb;119:31-36. doi: 10.1016/j.ypmed.2018.12.008. Epub 2018 Dec 19.
The overall aim of this study was to examine the association of physical activity (PA) and screen time (ST) on indicators of cardio-metabolic risk during adolescence, by examining the combined association of PA and ST at ages 11, 15 and 18 on cardio-metabolic risk factors at 18 years. Data from the 1993 Pelotas (Brazil) Birth Cohort Study (N = 3613) were analysed in 2017. Self-reported PA and ST data were collected at 11, 15 and 18 years. Cardio-metabolic risk factors (fat mass index, waist circumference, triglycerides, blood glucose, non-HDL cholesterol and resting diastolic blood pressure) were examined at age 18. Multivariate linear regression was used to examine the associations between four mutually exclusive PA/ST groups: 1) active (≥1 h/day PA) and low ST (<5 h/day ST); 2) active (≥1 h/day PA) and high ST (≥5 h/day ST); 3) inactive (<1 h/day PA) and low ST (<5 h/day ST); 4) inactive (<1 h/day PA) and high ST (≥5 h/day ST) at each age, and outcomes at age 18. There were no significant associations between PA/ST at ages 11 and 15 with outcomes at 18 years. In the cross-sectional analyses, adolescents in the most active group had significantly better levels of all the outcomes, regardless of ST. Inactive participants with high ST had the highest levels of glucose and non-HDL-C. For diastolic blood pressure, values were higher among inactive participants. Overall, higher levels of physical activity appeared to be more important than low levels of ST for cardio-metabolic health in adolescents.
本研究的总体目标是通过检查 11、15 和 18 岁时的 PA 和 ST 综合情况，研究青少年时期的 PA 和 ST 与心血管代谢风险指标之间的关系，评估心血管代谢风险因素在 18 岁时的相关性。2017 年对 1993 年佩洛塔斯（巴西）出生队列研究（N=3613）的数据进行了分析。在 11、15 和 18 岁时收集了自我报告的 PA 和 ST 数据。在 18 岁时检查了心血管代谢风险因素（脂肪质量指数、腰围、甘油三酯、血糖、非高密度脂蛋白胆固醇和静息舒张压）。采用多元线性回归分析方法，研究了四个相互排斥的 PA/ST 组之间的相关性：1）活跃（≥1 小时/天 PA）和低 ST（<5 小时/天 ST）；2）活跃（≥1 小时/天 PA）和高 ST（≥5 小时/天 ST）；3）不活跃（<1 小时/天 PA）和低 ST（<5 小时/天 ST）；4）不活跃（<1 小时/天 PA）和高 ST（≥5 小时/天 ST）在每个年龄的表现与 18 岁时的结果之间的关系。11 岁和 15 岁时的 PA/ST 与 18 岁时的结果之间没有显著关联。在横断面分析中，无论 ST 如何，处于最活跃组的青少年所有结果的水平均明显更好。高 ST 的不活跃参与者血糖和非高密度脂蛋白胆固醇水平最高。对于舒张压，不活跃参与者的数值较高。总体而言，对于青少年的心血管代谢健康，较高水平的体力活动似乎比低水平的 ST 更为重要。
