Jones G R, Brandon C, Gill D P
Healthy Exercise and Aging Laboratory Group, School of Health and Exercise Sciences, Faculty of Health and Social Development, University of British Columbia Okanagan, Kelowna, BC, Canada.
Health and Rehabilitation Sciences, Western University, London, ON, Canada.
Arch Gerontol Geriatr. 2017 Jul;71:28-33. doi: 10.1016/j.archger.2017.02.012. Epub 2017 Feb 22.
Winter weather conditions may negatively influence participation of older adults in daily physical activity (PA).
Assess the influence of winter meteorological variables, day-time peak ambient temperature, windchill, humidity, and snow accumulation on the ground to accelerometer measured PA values in older adults.
50 community-dwelling older adults (77.4±4.7yrs; range 71-89; 12 females) living in Southwestern Ontario (Latitude 42.9°N Longitude 81.2° W) Canada, wore a waist-borne accelerometer during active waking hours (12h) for 7 consecutive days between February and April 2007. Hourly temperature, windchill, humidity, and snowfall accumulation were obtained from meteorological records and time locked to hourly accelerometer PA values.
Regression analysis revealed significant relationships between time of day, ambient daytime high temperature and a humidity for participation in PA. Windchill temperature added no additional influence over PA acclamation already influenced by ambient day-time temperature and the observed variability in PA patterns relative to snow accumulation over the study period was too great to warrant its inclusion in the model. Most PA was completed in the morning hours and increased as the winter month's transitioned to spring (February through April).
An equation was developed to adjust for winter weather conditions using temperature, humidity and time of day.
Accurate PA assessment during the winter months must account for the ambient daytime high temperatures, humidity, and time of day. These older adults were more physically active during the morning hours and became more active as the winter season transitioned to spring.
冬季天气状况可能会对老年人参与日常体育活动（PA）产生负面影响。
评估冬季气象变量、日间最高环境温度、风寒指数、湿度和地面积雪对老年人通过加速度计测量的PA值的影响。
50名居住在加拿大安大略省西南部（北纬42.9°，西经81.2°）的社区老年人（77.4±4.7岁；年龄范围71 - 89岁；12名女性），在2007年2月至4月期间，于清醒活动时间（12小时）连续7天佩戴腰部加速度计。每小时的温度、风寒指数、湿度和降雪量数据来自气象记录，并与每小时加速度计的PA值进行时间锁定。
回归分析显示，一天中的时间、日间环境高温和湿度与参与PA之间存在显著关系。风寒温度对PA的影响并未超过已经受日间环境温度影响的PA，并且在研究期间观察到的PA模式相对于积雪的变异性太大，以至于无法将其纳入模型。大多数PA在上午完成，并且随着冬季向春季过渡（2月至4月）而增加。
开发了一个方程，用于根据温度、湿度和一天中的时间来调整冬季天气状况。
在冬季准确评估PA必须考虑日间环境高温、湿度和一天中的时间。这些老年人在上午时段身体活动更为活跃，并且随着冬季向春季过渡变得更加活跃。
