Summer to Winter Variability in the Step Counts of Normal Weight and Overweight Adults Living in the UK
Summer to Winter Variability in the Step Counts of Normal Weight and Overweight Adults Living in the UK
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DOI：
10.1123/jpah.8.1.36
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发表时间：
2011-01-01
影响因子：
3.1
通讯作者：
Griffiths, Paula L.
中科院分区：
文献类型：
--
作者：
Clemes, Stacy A.;Hamilton, Sarah L.;Griffiths, Paula L.
背景：本研究调查了正常体重和超重成年人的计步器确定的活动是否在夏季和冬季之间存在差异。研究方法：45名正常体重（58%女性，年龄= 39.1 +/- 12.4岁，BMI = 22.2 +/- 2.1 kg/m2）和51名超重（49%女性，年龄= 42.1 +/- 12.5岁，BMI = 29.3 +/- 4.5 kg/m2）参与者完成了一项受试者内双季计步器研究。所有参与者完成了2个为期4周的监测期; I期在夏季，1期在冬季。计算并比较了两个BMI组在不同季节的步数变化。结果如下：两个BMI组都报告了夏季到冬季的步数显著减少，正常体重组的变化幅度显著更大（-1737 +/-2201步/天vs 781 +/-1673步/天，P = .02）。两组冬季步数无显著差异（9250 +/- 2845步/天vs 8974 +/- 2709步/天，P = 0.63），而正常体重组报告的夏季平均每日步数显著较高（10986 +/- 2858步/天vs 9755 +/- 2874步/天，P = 0.04）。结论：正常体重和超重的人都经历了夏季和冬季之间的步数减少;然而，正常体重的人似乎更容易受到冬季步行活动减少的影响，最大的季节性变化发生在星期天。有效的体育活动政策应根据季节调整，以提供机会，鼓励个人在冬季，特别是周末更加活跃。
Background: This study investigated whether pedometer-determined activity varies between summer and winter in normal-weight and overweight adults. Methods: Forty-five normal-weight (58% female, age = 39.1 +/- 12.4 years, BMI = 22.2 +/- 2.1 kg/m(2)) and 51 overweight (49% female, age -= 42.1 +/- 12.5 years, BMI = 29.3 +/- 4.5 kg/m(2)) participants completed a within-subject biseasonal pedometer study. All participants completed 2 4-week monitoring periods; I period in the summer and 1 period the following winter. Changes in step counts across seasons were calculated and compared for the 2 BMI groups. Results: Both BMI groups reported significant summer to winter reductions in step counts, with the magnitude of change being significantly greater in the normal-weight group (-1737 +/- 2201 versus 781 +/- 1673 steps/day, P = .02). Winter step counts did not differ significantly between the 2 groups (9250 +/- 2845 versus 8974 +/- 2709 steps/day, P -= .63), whereas the normal-weight group reported a significantly higher mean daily step count in the summer (10986 +/- 2858 versus 9755 +/- 2874 steps/day, P = .04). Conclusion: Both normal-weight and overweight individuals experienced a reduction in step counts between summer and winter; however, normal-weight individuals appear more susceptible to winter decreases in ambulatory activity, with the greatest seasonal change occurring on Sundays. Effective physical activity policies should be seasonally tailored to provide opportunities to encourage individuals to be more active during the winter, particularly on weekends.