Priority Research Centre in Physical Activity and Nutrition, Faculty of Education and Arts, University of Newcastle, Newcastle, NSW, Australia; Deakin University, Geelong, School of Exercise and Nutrition Sciences, Australia.
Priority Research Centre in Physical Activity and Nutrition, Faculty of Education and Arts, University of Newcastle, Newcastle, NSW, Australia.
Prev Med. 2019 Aug;125:55-61. doi: 10.1016/j.ypmed.2019.05.009. Epub 2019 May 21.
This study aims to explore associations between physical activity intensity and well-being (i.e., positive and negative affect) in adolescents. A secondary aim was to determine if associations were moderated by sex. Grade 8 students from 14 government-funded secondary schools in low socio-economic areas of Western Sydney (Australia) were assessed. Data from three timepoints (baseline, 7-8 months, and 14-15 months) were combined to increase the sample size. Physical activity was objectively assessed for 1-week at each timepoint using Actigraph accelerometers. Time (minutes/day) in light, moderate and vigorous physical activity was estimated. The short form Positive and Negative Affect Scale for Children was used to measure well-being. Quantile regression was used to analyse the data. A total of 3140 observations were collected from 1223 students (mean age at baseline: 12.9(0.54); 55.1% male). Light and moderate physical activity was not associated with well-being. Higher levels of vigorous physical activity were associated with more positive affect [β(SE) = 0.307 (0.06), p < 0.001], to an estimated vigorous physical activity turning point [Point(95%CI) = 36.48 min/day (31.39-41.59)]. Similarly, higher levels of vigorous physical activity were associated with less negative affect [β(SE) = -0.250 (0.06), p < 0.001] up to the estimated vigorous physical activity turning point [Point(95%CI) = 37.35 min/day (31.27-43.44)]. The negative association between vigorous physical activity and negative affect was more pronounced in females than in males. Our findings highlight the importance of adolescents engaging in vigorous physical activity to improve positive affect and reduce negative affect.
本研究旨在探讨青少年身体活动强度与幸福感（即积极和消极情绪）之间的关联。次要目的是确定这些关联是否受到性别的调节。研究对象为来自澳大利亚西悉尼低社会经济地区 14 所政府资助中学的 8 年级学生。将三个时间点（基线、7-8 个月和 14-15 个月）的数据合并，以增加样本量。在每个时间点使用 Actigraph 加速度计对身体活动进行为期 1 周的客观评估。估计了轻、中、高强度身体活动的时间（分钟/天）。使用儿童正性和负性情绪量表短式版测量幸福感。使用分位数回归分析数据。从 1223 名学生中收集了 3140 个观测值（基线时的平均年龄为 12.9(0.54)；55.1%为男性）。轻、中强度身体活动与幸福感无关。较高水平的剧烈身体活动与更多的积极情绪相关[β(SE)=0.307 (0.06)，p<0.001]，估计剧烈身体活动转折点为[转折点（95%CI）=36.48 分钟/天（31.39-41.59）]。同样，较高水平的剧烈身体活动与较少的消极情绪相关[β(SE)=-0.250 (0.06)，p<0.001]，直至估计的剧烈身体活动转折点[转折点（95%CI）=37.35 分钟/天（31.27-43.44）]。在女性中，剧烈身体活动与消极情绪之间的负相关比男性更为明显。我们的研究结果强调了青少年积极参与剧烈身体活动以改善积极情绪和减少消极情绪的重要性。
