Department of Epidemiology, Erasmus MC, University Medical Centre, Rotterdam, The Netherlands.
Department of Epidemiology, Erasmus MC, University Medical Centre, Rotterdam, The Netherlands.
Maturitas. 2018 Apr;110:41-50. doi: 10.1016/j.maturitas.2018.01.016. Epub 2018 Jan 27.
Physical activity (PA) and sedentary behavior (SB) have seasonal patterns. It remains unclear how these patterns are associated with sleep, meteorological factors, and health.
Activity levels were continuously measured with an accelerometer for seven days between July 2011 and May 2016, among middle-aged (50-64 years), young-elderly (65-74 years) and old-elderly (≥75 years) participants of a population-based Dutch cohort study (n = 1116). Meteorological factors (ambient temperature, wind speed, sunlight hours, precipitation, and minimum visibility) were locally recorded. We first examined the seasonality of PA, SB, and nighttime sleep, stratified by age group. Second, we examined the influence of meteorological factors. Third, we modeled the potential seasonality of the all-cause mortality risk due to the seasonality of PA and SB, by using previously published relative risks.
Levels of light and moderate-to-vigorous PA were higher in summer than in winter among middle-aged (seasonal variation = 18.1 and 14.8 min/day) and young-elderly adults (12.8 and 8.6 min/day). The pattern was explained by ambient temperature and sunlight hours. Nighttime sleep was 31.8 min/day longer in winter among middle-aged adults. SB did not show a seasonal pattern. No seasonality in activity levels was observed among old-elderly adults. The all-cause mortality risk may be higher in winter than in summer due to the accumulation of low levels of moderate to vigorous PA and high levels of SB.
PA has a larger degree of seasonality than SB and nighttime sleep among middle-aged and young-elderly adults. SB appears strongly ingrained in daily routine. Recommending the interruption of SB with light PA might be a good starting point for public health institutions.
体力活动（PA）和久坐行为（SB）具有季节性模式。目前尚不清楚这些模式与睡眠、气象因素和健康之间的关系。
在 2011 年 7 月至 2016 年 5 月期间，使用加速度计连续测量了来自荷兰一项基于人群的队列研究的中年（50-64 岁）、年轻老年人（65-74 岁）和老年人（≥75 岁）参与者的七天活动水平（n=1116）。当地记录了气象因素（环境温度、风速、日照时间、降水和最小能见度）。我们首先按年龄组检查了 PA、SB 和夜间睡眠的季节性。其次，我们检查了气象因素的影响。第三，我们使用先前发表的相对风险，对由于 PA 和 SB 的季节性导致的全因死亡率风险的潜在季节性进行建模。
在中年（季节性变化分别为 18.1 和 14.8 分钟/天）和年轻老年人（12.8 和 8.6 分钟/天）中，夏季的轻 PA 和中到剧烈 PA 水平高于冬季。这种模式是由环境温度和日照时间解释的。中年成年人冬季的夜间睡眠时间长 31.8 分钟/天。SB 没有表现出季节性模式。老年老年人中没有观察到活动水平的季节性。由于中到剧烈 PA 水平低和 SB 水平高，全因死亡率风险可能在冬季高于夏季。
PA 比 SB 和中年和年轻老年人的夜间睡眠具有更大的季节性。SB 似乎深深地融入了日常生活中。建议公共卫生机构中断 SB 并进行轻度 PA 可能是一个很好的起点。
