O'Connell Sophie E, Griffiths Paula L, Clemes Stacy A
MoveLab; Physical Activity and Exercise Research, Institute of Cellular Medicine, 4th Floor William Leech Building, Newcastle University , Newcastle Upon Tyne NE2 4HH , UK and.
Ann Hum Biol. 2014 Jan-Feb;41(1):1-8. doi: 10.3109/03014460.2013.827737. Epub 2013 Sep 2.
Physical activity (PA), sedentary behaviour (SB), sleep and diet have all been associated with increased risk for chronic disease. Seasonality is often overlooked as a determinant of these behaviours in adults. Currently, no study has simultaneously monitored these behaviours in UK adults to assess seasonal variation.
The present study investigated whether PA, SB, sleep and diet differed over season in UK adults.
Forty-six adults (72% female; age = 41.7 ± 14.4 years, BMI = 24.9 ± 4.4 kg/m(2)) completed four 7-day monitoring periods; one during each season of the year. The ActiGraph GT1M was used to monitor PA and SB. Daily sleep diaries monitored time spent in bed (TIB) and total sleep time (TST). The European Prospective Investigation of Cancer (EPIC) food frequency questionnaire (FFQ) assessed diet. Repeated measures ANOVAs were used to identify seasonal differences in behaviours.
Light-intensity PA was significantly higher in summer and spring (p < 0.001). SB and TIB were significantly higher in winter (p < 0.01). There were no seasonal variations detected in moderate-vigorous PA, TST or diet (p > 0.05).
Findings support the concept that health promotion campaigns need to encourage year-round participation in light intensity PA, whilst limiting SB, particularly during the winter months.
身体活动（PA）、久坐行为（SB）、睡眠和饮食都与慢性病风险增加有关。季节性往往被忽视，而它是成年人这些行为的一个决定因素。目前，尚无研究在英国成年人中同时监测这些行为以评估季节变化。
本研究调查英国成年人的PA、SB、睡眠和饮食在不同季节是否存在差异。
46名成年人（72%为女性；年龄 = 41.7 ± 14.4岁，体重指数 = 24.9 ± 4.4 kg/m²）完成了四个为期7天的监测期，每年每个季节各一个。使用ActiGraph GT1M监测PA和SB。每日睡眠日记记录卧床时间（TIB）和总睡眠时间（TST）。欧洲癌症前瞻性调查（EPIC）食物频率问卷（FFQ）评估饮食情况。采用重复测量方差分析来确定行为的季节差异。
夏季和春季的轻度身体活动显著更高（p < 0.001）。冬季的久坐行为和卧床时间显著更高（p < 0.01）。在中等强度至剧烈强度的身体活动、总睡眠时间或饮食方面未检测到季节变化（p > 0.05）。
研究结果支持这样一种观点，即健康促进活动需要鼓励全年参与轻度身体活动，同时限制久坐行为，尤其是在冬季月份。
