Centre for Food Innovation, Stoddart Building, Sheffield Hallam University, S11WB Sheffield, UK.
Nutr Res. 2011 May;31(5):327-37. doi: 10.1016/j.nutres.2011.03.015. Epub 2011 May 6.
The aim of this study was to investigate the effects of a group behavior change intervention involving self-selected, contextualized, and mediated goal setting on anthropometric, affective, and dietary markers of health. It was hypothesized that the intervention would elicit changes consistent with accepted health recommendations for obese individuals. A rolling program of 12-week "Small Changes" interventions during 24 months recruited 71 participants; each program accommodated 10 to 13 adults (body mass index [BMI] ≥ 30 kg/m²). Fifty-eight participants completed Small Changes. Repeated measures were made at baseline, 6 and 12 weeks. Anthropometric measures included height and weight (to calculate BMI), body composition, waist circumference, and blood pressure. Affective state was monitored using relevant validated questionnaires. Dietary assessment used 3-day household measures food diaries with Schofield equations to monitor underreporting. Relevant blood measures were recorded throughout. Across the measurement period, Small Changes elicited a significant reduction in body weight (baseline, 102.95 ± 15.47 vs 12 weeks 100.09 ± 16.01 kg, P < .0005), coupled with associated significant improvements in BMI, body fat percentage, and waist circumference measures. There were additional significant positive changes in measures of affective state including general well-being (baseline, 58.92 ± 21.22 vs 12 weeks 78.04 ± 14.60, P < .0005) and total mood disturbance (baseline, 31.19 ± 34.03 vs 12 weeks 2.67 ± 24.96, P < .0005). Dietary changes that occurred were largely consistent with evidenced-based recommendations for weight management and included significant reductions in total energy intake and in fat and saturated fat as a proportion of energy. The Small Changes approach can elicit a range of health-orientated benefits for obese participants, and although further work is needed to ascertain the longevity of such effects, the outcomes from Small Changes are likely to help inform health professionals when framing the future of weight management. Long-term follow-up of Small Changes is warranted.
本研究旨在探讨一种群体行为改变干预措施的效果，该干预措施包括自我选择、情境化和中介目标设定，以衡量与健康相关的人体测量学、情感和饮食指标。研究假设该干预措施将引起与肥胖人群接受的健康建议一致的变化。在 24 个月内，通过滚动计划开展为期 12 周的“小改变”干预，共招募了 71 名参与者；每个计划容纳 10 至 13 名成年人（体重指数[BMI]≥30kg/m²）。58 名参与者完成了“小改变”。在基线、6 周和 12 周时进行重复测量。人体测量学指标包括身高和体重（计算 BMI）、身体成分、腰围和血压。通过相关的有效问卷监测情感状态。饮食评估使用 3 天家庭食物日记和 Schofield 方程进行监测，以监测报告不足。整个测量期间，记录相关血液测量结果。在整个测量期间，“小改变”方案显著降低了体重（基线时为 102.95±15.47kg，12 周时为 100.09±16.01kg，P<.0005），同时伴随 BMI、体脂肪百分比和腰围测量的显著改善。情感状态的其他指标也有显著的积极变化，包括整体幸福感（基线时为 58.92±21.22，12 周时为 78.04±14.60，P<.0005）和总情绪困扰（基线时为 31.19±34.03，12 周时为 2.67±24.96，P<.0005）。发生的饮食变化在很大程度上与体重管理的循证建议一致，包括总能量摄入和脂肪以及饱和脂肪作为能量比例的显著减少。“小改变”方法可以为肥胖参与者带来一系列健康益处，尽管需要进一步的工作来确定这种效果的持久性，但“小改变”的结果可能有助于健康专业人员在制定未来的体重管理方案时提供信息。需要对“小改变”进行长期随访。
