Increased Walking's Additive and No Substitution Effect on Total Physical Activity.
Increased Walking's Additive and No Substitution Effect on Total Physical Activity.
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DOI：
10.1249/mss.0000000000001450
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发表时间：
2018-03
影响因子：
4.1
通讯作者：
Saelens BE
中科院分区：
文献类型：
--
作者：
Kang B;Moudon AV;Hurvitz PM;Saelens BE
我们评估了城市生活成人样本中步行时间的变化和总体力活动时间(PA)变化之间的关系，以测试相加或替代效应。居住在大西雅图地区的参与者在2008-2009年接受了评估，并在1-2年后(2010-2011年)再次进行了评估。在每个时间点，他们都佩戴着加速计和GPS装置，并连续7天在旅行日记中记录行程和地点。这些数据流被组合在一起，得出了一个更客观的步行和总PA的估计。参与者还完成了国际体力活动问卷，以提供自我报告的步行估计和总PA。回归分析评估了参与者内部目标和自我报告步行的变化与总PA之间的关系。数据来自437名参与者。平均而言，总步行增加1分钟与总PA增加1分钟(通过客观数据测量)和1.2分钟(通过自我报告数据测量)相关。通过客观和自我报告的数据衡量，功利性步行、交通工具或与工作相关的步行都一致地发现了类似的相加效应。对于娱乐性散步，变化的影响混合在客观和自我报告的结果之间。客观和自我报告的数据都证实了功利性步行和完全步行对PA的相加效应。
We assessed the associations between a change in time spent walking and a change in total physical activity (PA) time within an urban living adult sample, to test for additive or substitution effects. Participants living in the greater Seattle area were assessed in 2008–2009 and again 1–2 years later (2010–2011). At each time point, they wore accelerometers and GPS units and recorded trips and locations in a travel diary for 7 consecutive days. These data streams were combined to derive a more objective estimate of walking and total PA. Participants also completed the International Physical Activity Questionnaire to provide self-reported estimates of walking and total PA. Regression analyses assessed the associations between within-participant changes in objective and self-reported walking and total PA. Data came from 437 participants. On average, a 1-minute increase in total walking was associated with an increase in total PA of 1 minute, measured by objective data and 1.2-minute, by self-reported data. A similar additive effect was consistently found with utilitarian, transportation, or job-related walking, measured by both objective and self-reported data. For recreational walking, the effect of change was mixed between objective and self-reported results. Both objective and self-reported data confirmed an additive effect of utilitarian and total walking on PA.