Physical activity levels of older community-dwelling adults are influenced by summer weather variables
Physical activity levels of older community-dwelling adults are influenced by summer weather variables
复制标题
DOI：
10.1139/h09-004
复制
发表时间：
2009-04-01
影响因子：
3.4
通讯作者：
Jones, Gareth R.
中科院分区：
文献类型：
--
作者：
Brandon, Caitlin A.;Gill, Dawn P.;Jones, Gareth R.
充足的日常体力活动（PA）对于维持老年人的功能能力和独立性非常重要。然而，加拿大的大多数老年人没有足够的PA来维持健康和功能独立。环境的影响，如白天温度较高，可能会影响PA的参与;然而，很少有研究探讨夏季温度对老年人PA水平的影响。这项调查测量了夏季天气变量对PA的影响，在48个社区居住的老年人谁是从当地老年人的社区中心随机招募。每位参与者在清醒时间内佩戴加速计，持续7个传唤日（2006年5月30日至8月9日），并完成PA日志，记录每日主要PA事件。从国家气象局收集当地的天气变量，并与每分钟PA计数进行比较。回归分析显示对数转换后的PA与日平均温度之间存在曲线关系（r（2）= 0.025; p < 0.05）。针对每月周期、气象变量、性别、年龄和估计的最大耗氧量，以PA为因变量，建立了线性混合效应模型，该模型考虑了嵌套在个体内的重复测量值。年龄和空气质量指数仍然是模型中的重要变量。较高的健身水平没有影响，让个人进行更有力的PA在温暖的温度。
Adequate daily physical activity (PA) is important for maintaining functional capacity and independence in older adults. However, most older adults in Canada do not engage in enough PA to sustain fitness and functional independence. Environmental influences, such as warmer daytime temperatures, may influence PA participation; however, few studies have examined the effect of summertime temperatures on PA levels in older adults. This investigation measured the influence of summertime weather variables on PA in 48 community-dwelling older adults who were randomly recruited from a local seniors' community centre. Each participant wore an accelerometer for a single 7-consecutive-day period ( between 30 May and 9 August 2006) during waking hours, and completed a PA logbook to remark on major daily PA events. Local weather variables were collected from a national weather service and compared with PA counts per minute. Regression analysis revealed a curvilinear relationship between log-transformed PA and mean daily temperature (r(2) = 0.025; p < 0.05). Linear mixed effects models that accounted for repeated measures nested within individuals were performed for monthly periods, meteorological variables, sex, age, and estimated maximal oxygen consumption, with PA as the dependent variable. Age and Air Quality Index remained significant variables within the model. Higher fitness levels had no effect on allowing individuals to perform more vigorous PA in warmer temperatures.