Evidence that women meeting physical activity guidelines do not sit less: An observational inclinometry study
Evidence that women meeting physical activity guidelines do not sit less: An observational inclinometry study
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DOI：
10.1186/1479-5868-9-122
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发表时间：
2012-10-04
影响因子：
8.7
通讯作者：
Hamilton, Marc T.
中科院分区：
文献类型：
--
作者：
Craft, Lynette L.;Zderic, Theodore W.;Hamilton, Marc T.
背景资料：不活动生理学范式提出，久坐行为，包括坐得太久，与《美国人身体活动指南》中为健康所描述的身体活动类型无关。因此，我们假设，当占整个一天的行为，坐着的时间的变化量将是独立的个体间和个体内的时间从事持续的中度到剧烈的体力活动（MVPA）。方法：91名健康女性，年龄在40-75岁，完成了人口统计学调查问卷和身高和体重的评估。参与者佩戴activPAL活动监测仪一周，量化坐着、站立、行走和持续发作（发作>= 10分钟）MVPA的时间（分钟/天）。然后根据每周持续的MVPA将这些妇女分层。此外，每名参与者的数据收集日被归类为“充分”MVPA日（>= 30分钟MVPA）或“不足”MVPA日进行参与者内分析。坐着、站着和偶然的非运动踏步时间平均分别为64、28和11小时/周，并且在满足/超过当前推荐的每周150分钟持续MVPA（>= 10分钟）的运动量的组间无差异（M = 294分钟/周，SD = 22）与无或最低水平（M= 20分钟/周，SD = 4）相比。静坐时间（M = 9.1小时/天，SD = 0.19 vs. M = 8.8小时/天，SD = 0.22），站立（M = 3.9小时/天，SD = 0.16 vs. M = 3.9小时/天，SD = 0.15）和间歇步进（M = 1.6小时/天，SD = 0.07 vs. M = 1.6小时/天，SD = 0.06），（类似于55分钟/天）和不推荐的MVPA。结论：这项研究提供了第一个客观证据，证明在相对健康的人群中，中老年妇女。需要更多的研究来将这些发现扩展到其他人群，并为专注于久坐时间的不同行为建议提供信息。
Background: The inactivity physiology paradigm proposes that sedentary behaviors, including sitting too much, are independent of the type of physical activity delineated for health in the Physical Activity Guidelines for Americans. Thus, we hypothesized that, when accounting for behaviors across the entire day, variability in the amount of time spent sitting would be independent of the inter-and intra-individual time engaged in sustained moderate-to-vigorous physical activity (MVPA).Methods: Ninety-one healthy women, aged 40-75 years, completed a demographic questionnaire and assessment of height and weight. Participants wore the activPAL activity monitor for one week and time (minutes/day) spent sitting, standing, stepping, and in sustained bouts (bouts >= 10 minutes) of MVPA were quantified. The women were then stratified into groups based on weekly sustained MVPA. Additionally, each day of data collection for each participant was classified as either a "sufficient" MVPA day (>= 30 min of MVPA) or an "insufficient" MVPA day for within-participant analyses.Results: Time spent sitting, standing, and in incidental non-exercise stepping averaged 64, 28, and 11 hrs/week, respectively, and did not differ between groups with individuals meeting/exceeding the current exercise recommendation of 150 min/week of sustained MVPA in >= 10 minutes bouts (M = 294 min/week, SD = 22) compared to those with none or minimal levels (M= 20min/week, SD = 4). Time spent sitting (M = 9.1 hr/day, SD = 0.19 vs. M = 8.8 hr/day, SD = 0.22), standing (M = 3.9 hr/day, SD = 0.16 vs. M = 3.9 hr/day, SD = 0.15), and in intermittent stepping (M = 1.6 hr/day, SD = 0.07 vs. M = 1.6 hr/day, SD = 0.06) did not differ between days with (similar to 55 min/day) and without recommended MVPA.Conclusions: This study provides the first objective evidence that participation in sustained MVPA is unrelated to daily sitting duration in relatively healthy, middle and older-aged women. More research is needed to extend these findings to other populations and to inform distinct behavioral recommendations focused on sedentary time.