Arnardottir Nanna Yr, Oskarsdottir Nina Dora, Brychta Robert J, Koster Annemarie, van Domelen Dane R, Caserotti Paolo, Eiriksdottir Gudny, Sverrisdottir Johanna E, Johannsson Erlingur, Launer Lenore J, Gudnason Vilmundur, Harris Tamara B, Chen Kong Y, Sveinsson Thorarinn
Faculty of Education, University of Akureyri, Nordurslod 2, 600 Akureyri, Iceland.
Icelandic Heart Association, Holtasmári 1, 201 Kópavogur, Iceland.
Int J Environ Res Public Health. 2017 Oct 21;14(10):1268. doi: 10.3390/ijerph14101268.
In Iceland, there is a large variation in daylight between summer and winter. The aim of the study was to identify how this large variation influences physical activity (PA) and sedentary behavior (SB). Free living PA was measured by a waist-worn accelerometer for one week during waking hours in 138 community-dwelling older adults (61.1% women, 80.3 ± 4.9 years) during summer and winter months. In general, SB occupied about 75% of the registered wear-time and was highly correlated with age (β = 0.36). Although the differences were small, more time was spent during the summer in all PA categories, except for the moderate-to-vigorous PA (MVPA), and SB was reduced. More lifestyle PA (LSPA) was accumulated in ≥5-min bouts during summer than winter, especially among highly active participants. This information could be important for policy makers and health professionals working with older adults. Accounting for seasonal difference is necessary in analyzing SB and PA data.
在冰岛，夏季和冬季的日照时长差异很大。本研究的目的是确定这种巨大差异如何影响身体活动（PA）和久坐行为（SB）。在夏季和冬季，通过佩戴在腰部的加速度计对138名社区居住的老年人（61.1%为女性，年龄80.3±4.9岁）清醒时的一周自由生活PA进行测量。总体而言，SB约占记录的佩戴时间的75%，且与年龄高度相关（β = 0.36）。尽管差异很小，但除了中等到剧烈身体活动（MVPA）外，夏季在所有PA类别上花费的时间更多，且SB减少。与冬季相比，夏季≥5分钟时长的生活方式身体活动（LSPA）积累更多，尤其是在高活动水平的参与者中。这些信息对于与老年人打交道的政策制定者和健康专业人员可能很重要。在分析SB和PA数据时考虑季节差异是必要的。
