Department of Medicine, University of California, San Diego, CA 92103, USA.
Health Psychol. 2012 Nov;31(6):704-13. doi: 10.1037/a0027874. Epub 2012 Apr 30.
Sedentary (sitting) time is a newly identified risk factor for obesity and chronic diseases, which is behaviorally and physiologically distinct from lack of physical activity. To inform public health approaches to influencing sedentary behaviors, an understanding of correlates is required.
Participants were 2,199 adults aged 20-66 years living in King County/Seattle, WA, and Baltimore, MD, regions, recruited from neighborhoods high or low on a "walkability index" (derived from objective built environment indicators) and having high or low median incomes. Cross-sectional associations of walkability and income with total sedentary time (measured by accelerometers and by self-report) and with self-reported time in seven specific sitting-related behaviors were examined.
Neighborhood walkability and income were unrelated to measures of total sitting time. Lower neighborhood walkability was significantly associated with more driving time (difference of 18.2 min/day, p < .001) and more self-reported TV viewing (difference of 14.5 min/day, p < .001). Residents of higher income neighborhoods reported more computer/Internet and reading time, and they had more objectively measured sedentary time.
Neighborhood walkability was not related to total sedentary time but was related to two specific sedentary behaviors associated with risk for obesity-driving time and TV viewing time. Future research could examine how these prevalent and often prolonged sedentary behaviors mediate relationships between neighborhood walkability and overweight/obesity. Initiatives to reduce chronic disease risk among residents of both higher-and lower-income low-walkable neighborhoods should include a focus on reducing TV viewing time and other sedentary behaviors and enacting policies that can lead to the development or redevelopment of more-walkable neighborhoods. (PsycINFO Database Record (c) 2012 APA, all rights reserved).
久坐（坐立）时间是肥胖和慢性病的一个新的风险因素，它在行为和生理上有别于缺乏身体活动。为了告知影响久坐行为的公共卫生方法，需要了解相关因素。
参与者为 2199 名年龄在 20-66 岁的成年人，居住在华盛顿州金县/西雅图和马里兰州巴尔的摩地区，是根据“步行指数”（由客观的建成环境指标得出）较高或较低的社区和高或低中位数收入招募的。检查了步行指数和收入与总久坐时间（通过加速度计和自我报告测量）以及与七个特定坐姿相关行为的自我报告时间的横断面关联。
邻里步行指数和收入与总坐姿时间无关。较低的邻里步行指数与更多的驾驶时间（每天相差 18.2 分钟，p<0.001）和更多的自我报告电视观看时间（每天相差 14.5 分钟，p<0.001）显著相关。收入较高社区的居民报告了更多的电脑/互联网和阅读时间，并且他们有更多的客观测量的久坐时间。
邻里步行指数与总久坐时间无关，但与两种特定的与肥胖风险相关的久坐行为有关，即驾驶时间和看电视时间。未来的研究可以研究这些普遍且经常持续的久坐行为如何在邻里步行指数与超重/肥胖之间的关系中发挥作用。在高收入和低收入低步行性社区的居民中减少慢性病风险的举措应包括减少看电视时间和其他久坐行为，并制定可以导致更适合步行的社区发展或重建的政策。（PsycINFO 数据库记录（c）2012 APA，保留所有权利）。
