B-移动应用程序——一种基于智能手机的干预措施，用于减少超重/肥胖个体的久坐时间：一项受试者内实验性试验。
B-MOBILE--a smartphone-based intervention to reduce sedentary time in overweight/obese individuals: a within-subjects experimental trial.
作者信息
Bond Dale S, Thomas J Graham, Raynor Hollie A, Moon Jon, Sieling Jared, Trautvetter Jennifer, Leblond Tiffany, Wing Rena R
机构信息
Department of Psychiatry and Human Behavior, Alpert Medical School of Brown University, The Miriam Hospital/Weight Control and Diabetes Research Center, Providence, Rhode Island, United States of America.
Department of Nutrition, University of Tennessee, Knoxville, Tennessee, United States of America.
出版信息
PLoS One. 2014 Jun 25;9(6):e100821. doi: 10.1371/journal.pone.0100821. eCollection 2014.
PURPOSE
Excessive sedentary time (SED) has been linked to obesity and other adverse health outcomes. However, few sedentary-reducing interventions exist and none have utilized smartphones to automate behavioral strategies to decrease SED. We tested a smartphone-based intervention to monitor and decrease SED in overweight/obese individuals, and compared 3 approaches to prompting physical activity (PA) breaks and delivering feedback on SED.
DESIGN AND METHODS
Participants [N = 30; Age = 47.5(13.5) years; 83% female; Body Mass Index (BMI) = 36.2(7.5) kg/m2] wore the SenseWear Mini Armband (SWA) to objectively measure SED for 7 days at baseline. Participants were then presented with 3 smartphone-based PA break conditions in counterbalanced order: (1) 3-min break after 30 SED min; (2) 6-min break after 60 SED min; and (3) 12-min break after 120 SED min. Participants followed each condition for 7 days and wore the SWA throughout.
RESULTS
All PA break conditions yielded significant decreases in SED and increases in light (LPA) and moderate-to-vigorous PA (MVPA) (p<0.005). Average % SED at baseline (72.2%) decreased by 5.9%, 5.6%, and 3.3% [i.e. by mean (95% CI) -47.2(-66.3, -28.2), -44.5(-65.2, -23.8), and -26.2(-40.7, -11.6) min/d] in the 3-, 6-, and 12-min conditions, respectively. Conversely, % LPA increased from 22.8% to 26.7%, 26.7%, and 24.7% [i.e. by 31.0(15.8, 46.2), 31.0(13.6, 48.4), and 15.3(3.9, 26.8) min/d], and % MVPA increased from 5.0% to 7.0%, 6.7%, and 6.3% (i.e. by 16.2(8.5, 24.0), 13.5(6.3, 20.6), and 10.8(4.2, 17.5) min/d] in the 3-, 6-, and 12-min conditions, respectively. Planned pairwise comparisons revealed the 3-min condition was superior to the 12-min condition in decreasing SED and increasing LPA (p<0.05).
CONCLUSION
The smartphone-based intervention significantly reduced SED. Prompting frequent short activity breaks may be the most effective way to decrease SED and increase PA in overweight/obese individuals. Future investigations should determine whether these SED reductions can be maintained long-term.
TRIAL REGISTRATION
ClinicalTrials.gov NCT01688804.
目的
久坐时间过长与肥胖及其他不良健康后果相关。然而，减少久坐行为的干预措施很少，且尚无利用智能手机自动执行行为策略以减少久坐时间的干预措施。我们测试了一种基于智能手机的干预措施，以监测并减少超重/肥胖个体的久坐时间，并比较了三种促使进行身体活动（PA）休息及提供久坐时间反馈的方法。
设计与方法
参与者 [N = 30；年龄 = 47.5（13.5）岁；83% 为女性；体重指数（BMI）= 36.2（7.5）kg/m²] 在基线时佩戴SenseWear Mini臂带（SWA）客观测量久坐时间，为期7天。然后，参与者按照平衡顺序接受三种基于智能手机的PA休息条件：（1）久坐30分钟后休息3分钟；（2）久坐60分钟后休息6分钟；（3）久坐120分钟后休息12分钟。参与者在每种条件下持续7天，并全程佩戴SWA。
结果
所有PA休息条件均使久坐时间显著减少，轻度身体活动（LPA）和中度至剧烈身体活动（MVPA）增加（p<0.005）。在3分钟、6分钟和12分钟条件下，基线时的平均久坐时间百分比（72.2%）分别下降了5.9%、5.6%和3.3% [即平均（95% CI）-47.2（-66.3，-28.2）、-44.5（-65.2，-23.8）和-26.2（-40.7，-11.6）分钟/天]。相反，LPA百分比从22.8%分别增加到26.7%、26.7%和24.7% [即增加31.0（15.8，46.2）、31.0（13.6，48.4）和15.3（3.9，26.8）分钟/天]，MVPA百分比从5.0%分别增加到7.0%、6.7%和6.3%（即增加16.2（8.5，24.0）、13.5（6.3，20.6）和10.8（4.2，17.5）分钟/天）。计划的两两比较显示，在减少久坐时间和增加LPA方面，3分钟条件优于12分钟条件（p<0.05）。
结论
基于智能手机的干预措施显著减少了久坐时间。促使频繁进行短时间活动休息可能是减少超重/肥胖个体久坐时间和增加身体活动的最有效方法。未来的研究应确定这些久坐时间的减少能否长期维持。
试验注册
ClinicalTrials.gov NCT01688804。
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