Trends in Adherence to the Physical Activity Guidelines for Americans for Aerobic Activity and Time Spent on Sedentary Behavior Among US Adults, 2007 to 2016
Trends in Adherence to the Physical Activity Guidelines for Americans for Aerobic Activity and Time Spent on Sedentary Behavior Among US Adults, 2007 to 2016
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DOI：
10.1001/jamanetworkopen.2019.7597
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发表时间：
2019-07-01
影响因子：
13.8
通讯作者：
Bao, Wei
中科院分区：
文献类型：
--
作者：
Du, Yang;Liu, Buyun;Bao, Wei
重要性：2018年美国《体力活动指南》（PAG）更新版重申了2008年版中有关有氧运动的关键建议，并近期介绍了久坐行为的健康风险及其与体力活动的关联。
目的：研究2007年至2016年美国成年人遵守有氧运动PAG情况以及久坐行为所花时间的同时变化趋势。
设计、环境和参与者：本研究使用了2007年至2016年美国国家健康与营养检查调查中一系列具有全国代表性的18岁及以上成年人横断面调查的数据。数据分析于2018年9月1日至2019年3月31日进行。
主要结果和测量指标：通过标准化问卷确定休闲时间、工作相关和交通相关有氧运动的时长、频率和强度，并汇总为每周的分钟数。遵守有氧运动PAG的定义为每周至少进行150分钟中等强度或75分钟高强度有氧运动，或中等强度和高强度有氧运动的等效组合。久坐行为所花时间通过典型一天中坐着的小时数来估算。
结果：在27343名18岁及以上参与者（13630名[52.0%]为女性；14628名[66.6%]为非西班牙裔白人）中，2015 - 2016年有氧运动PAG的加权遵守率为65.2%（95%置信区间，62.3% - 68.2%），从2007 - 2008年（63.2%；95%置信区间，60.2% - 66.1%）到2015 - 2016年无显著变化（趋势P = 0.15）。久坐行为所花时间随时间显著增加，从2007 - 2008年加权均值（标准误）每天5.7（0.3）小时增加到2015 - 2016年每天6.4（0.2）小时（P < 0.001）。每天久坐时间较长（≥6小时）的比例从2007 - 2008年的16.1%（95%置信区间，14.4% - 17.8%）增加到2015 - 2016年的18.8%（95%置信区间，17.7% - 20.0%）。
结论和相关性：研究结果表明，自2008年第一版发布以来，美国成年人遵守有氧运动PAG的比率没有提高，但久坐行为所花时间随时间显著增加。在美国，似乎有必要进一步在全国范围内做出努力，不仅要促进体力活动，还要减少久坐时间。
IMPORTANCE The updated 2018 Physical Activity Guidelines for Americans (PAG) reaffirmed key recommendations regarding aerobic activity in the 2008 edition and recently introduced health risks of sedentary behaviors and their association with physical activity.OBJECTIVE To examine the concurrent changing trends in adherence to the PAG for aerobic activity and time spent on sedentary behavior in US adults from 2007 to 2016.DESIGN, SETTING, AND PARTICIPANTS This study used data from a series of cross-sectional, nationally representative surveys on adults 18 years or older from the National Health and Nutrition Examination Surveys from 2007 to 2016. Data analysis was performed from September 1, 2018, to March 31, 2019.MAIN OUTCOMES AND MEASURES Duration, frequency, and intensity of leisure-time, work related, and transportation-related aerobic activity were ascertained by a standardized questionnaire and summed as minutes per week. Adherence to the PAG for aerobic activity was defined as engaging in at least 150 minutes a week of moderate-intensity or 75 minutes a week of vigorous intensity aerobic physical activity or an equivalent combination of moderate- and vigorous-intensity aerobic physical activity. Time spent on sedentary behavior was estimated by hours spent sitting on a typical day.RESULTS Among 27 343 participants 18 years or older (13 630 [52.0%] female; 14 628 [66.6%] non-Hispanic white), the weighted adherence rate to the PAG for aerobic activity was 65.2% (95% CI, 62.3%-68.2%) in 2015-2016, with no significant change from 2007-2008 (63.2%; 95% CI, 60.2%-66.1%) to 2015-2016 (P =.15 for trend). Time spent on sedentary behavior significantly increased over time from a weighted mean (SE) of 5.7 (0.3) hours per day in 20 07-20 08 to 6.4 (0.2) hours per day in 2015-2016 (P 6 hours per day) increased from 16.1% (95% CI, 14.4%-17.8%) in 20 07-20 08 to 18.8% (95% CI, 17.7%-20.0%) in 2015-2016.CONCLUSIONS AND RELEVANCE The findings suggest that the adherence rate to the PAG for aerobic activity in US adults has not improved since the release of the first edition in 2008 but that time spent on sedentary behavior has significantly increased over time. Further nationwide efforts appear to be warranted to not only promote physical activity but also reduce sedentary time in the United States.