Unick Jessica L, O'Leary Kevin C, Bond Dale S, Wing Rena R
Weight Control and Diabetes Research Center, The Miriam Hospital and Brown Medical School, Providence, RI.
ISRN Obes. 2012 Sep 5;2012. doi: 10.5402/2012/465158.
Severe obesity is characterized by low physical activity (PA) and interventions to enhance PA are needed. Participants (45.0 ± 3.9 kg/m2) were randomized to a 6-month standard behavioral weight loss program (SBWL; = 14) or SBWL+technology (SBWL+TECH; = 15). Both groups received identical SBWL treatment and SBWL+TECH also received a wearable PA monitor, providing "real-time" feedback, and website access to monitor energy balance. 6-month retention was similar between groups (SBWL: 12/13 versus SBWL+TECH: 11/14 completers; = 0.19) and adherence to wearing the armband was excellent (91.3% of days). Although differences in PA between groups did not meet conventional thresholds of significance, SBWL+TECH increased their moderate-to-vigorous intensity PA by 132.9±216.8 min/week, which was 3 times greater than SBWL (44.8±124.3 min/week; = 0.27; Cohen's = 0.50). There was a trend for SBWL+TECH to self-monitor for a greater proportion of days compared to SBWL (86.2±21.4% versus 71.5±19.4%; = 0.098; Cohen's = 0.72). The difference in weight loss between groups was modest (SBWL+TECH: -10.0 ± 7.1% versus SBWL: -7.8 ± 6.7%; = 0.46). These preliminary findings suggest that PA monitors may be one strategy for increasing PA among the severely obese. Larger, long-term trials are needed.
重度肥胖的特点是身体活动（PA）水平低，因此需要采取干预措施来提高PA。参与者（体重指数为45.0±3.9kg/m²）被随机分为两组，一组接受为期6个月的标准行为减肥计划（SBWL；n = 14），另一组接受SBWL+技术干预（SBWL+TECH；n = 15）。两组都接受相同的SBWL治疗，SBWL+TECH组还获得了一个可穿戴的PA监测器，提供“实时”反馈，并可通过网站监测能量平衡。两组的6个月留存率相似（SBWL组：12/13名完成者，SBWL+TECH组：11/14名完成者；P = 0.19），佩戴臂带的依从性很好（91.3%的天数）。虽然两组之间的PA差异未达到传统的显著性阈值，但SBWL+TECH组将其中度至剧烈强度的PA增加了132.9±216.8分钟/周，是SBWL组（44.8±124.3分钟/周）的3倍（P = 0.27；科恩d值 = 0.50）。与SBWL组相比，SBWL+TECH组有更多天数进行自我监测的趋势（86.2±21.4%对71.5±19.4%；P = 0.098；科恩d值 = 0.72）。两组之间的体重减轻差异不大（SBWL+TECH组：-10.0±7.1%，SBWL组：-7.8±6.7%；P = 0.46）。这些初步研究结果表明，PA监测器可能是增加重度肥胖者PA的一种策略。需要进行更大规模的长期试验。
