Lifestyle intervention effects on the frequency and duration of daily moderate-vigorous physical activity and leisure screen time.
Lifestyle intervention effects on the frequency and duration of daily moderate-vigorous physical activity and leisure screen time.
复制标题
DOI：
10.1037/hea0000418
复制
发表时间：
2017-04
期刊：
影响因子：
--
通讯作者：
Spring B
中科院分区：
文献类型：
--
作者：
Conroy DE;Hedeker D;McFadden HG;Pellegrini CA;Pfammatter AF;Phillips SM;Siddique J;Spring B
健康的生活方式干预如何改变日常中高强度体力活动以及久坐行为的频率和时长，尚未得到很好的阐释。对“做出更好选择”随机对照试验的数据进行了二次分析，以评估增加体力活动或减少休闲屏幕使用时间的干预措施在治疗开始和随访期间如何影响这些行为的频率和时长。
参与者是202名成年人，他们在14天的基线筛查期内表现出体力活动不足、屏幕使用时间过长以及饮食不良。该研究设计为随机对照试验，干预期为三周，在干预结束后的6个月随访期内有8次每次3 - 7天的数据收集。参与者每天结束时自行报告其体力活动和屏幕使用时间。
一个两部分的多层模型表明，相对于基线水平，体力活动干预增加了干预期间每日中高强度体力活动（频率）的几率，但没有增加活动时长，并且这些影响在随访期间持续存在（尽管程度稍弱）。屏幕时间干预从干预开始到随访期减少了每日屏幕使用时间的频率和时长。
为期三周的干预增加了每日体力活动的频率但没有增加时长，并且减少了每日休闲屏幕使用时间的频率和时长。这些影响在干预结束后的20周内得以维持。
How a healthy lifestyle intervention changes the frequency and duration of daily moderate-vigorous physical activity and sedentary behavior has not been well-characterized. Secondary analyses of data from the Make Better Choices randomized controlled trial were conducted to evaluate how interventions to increase physical activity or reduce leisure screen time affected the frequency and duration of these behaviors during treatment initiation and follow-up. Participants were 202 adults who exhibited insufficient physical activity, excessive screen time and poor diet during a 14-day baseline screening period. The design was a randomized controlled trial with a three-week intervention period followed by eight 3-7 day bursts of data collection over the 6-month follow-up period after intervention termination. Participants self-reported on their physical activity and screen time at the end of each day. A two-part multilevel model indicated that, relative to baseline levels, the physical activity intervention increased the odds of daily moderate-vigorous intensity physical activity (frequency) but not the duration of activity during the intervention period and these effects persisted (albeit somewhat more weakly) during the follow-up period. The screen time intervention reduced both the frequency and duration of daily screen time from the beginning of the intervention through the follow-up period. A three-week intervention increased daily physical activity frequency but not duration, and reduced both the frequency and duration of daily leisure screen time. These effects were maintained over 20 weeks following the end of the intervention.