Department of Health and Physical Activity, Physical Activity and Weight Management Research Center, University of Pittsburgh, Pittsburgh, PA 15260, USA.
Med Sci Sports Exerc. 2010 Apr;42(4):745-53. doi: 10.1249/MSS.0b013e3181bd1a57.
Sustaining weight loss at the long term is difficult.
To examine if eating behaviors, physical activity levels, and program participation influence ones ability to achieve ≥5%, ≥7%, and ≥10% weight loss during a period of 24 months.
Data from 170 overweight and obese women (body mass index = 32.7 ± 4.2 kg·m(-2)) were analyzed in this study. All women followed a standard 24-month behavioral weight loss program in which they were instructed to decrease caloric intake and increase physical activity levels. Eating behaviors, body weight, and physical activity levels were assessed at baseline and at 6 and 24 months. Program participation was evaluated by the percentage of group meetings attended and the percentage of telephone calls completed with an interventionist. Three separate stepwise linear regression analyses were performed to identify variables that were predictive of ≥5%, ≥7%, and ≥10% weight loss at 24 months.
The percentage of telephone calls completed and change in weight loss eating behaviors predicted ≥5% (r2 = 0.16), ≥7% (r2 = 0.14), and ≥10% weight loss (r2 = 0.10) at 24 months. However, the change in physical activity levels from baseline to 24 months was only predictive of weight losses ≥10% (r2 = 0.11).
Behavioral factors, such as adopting healthy eating behaviors and telephone contact time, are important components that assist individuals in achieving weight losses ≥5%. However, high levels of physical activity play a more prominent role in sustaining weight losses ≥10%. Therefore, innovative strategies to enhance long-term exercise adherence should be developed.
长期保持体重减轻是困难的。
检查饮食行为、身体活动水平和项目参与是否会影响个体在 24 个月期间实现≥5%、≥7%和≥10%体重减轻的能力。
本研究分析了 170 名超重和肥胖女性（体重指数=32.7±4.2kg·m(-2)）的数据。所有女性均遵循标准的 24 个月行为体重减轻计划，该计划要求她们减少热量摄入并增加身体活动水平。在基线和 6 个月和 24 个月时评估饮食行为、体重和身体活动水平。通过参加小组会议的百分比和与干预者完成的电话通话的百分比来评估项目参与情况。进行了三次单独的逐步线性回归分析，以确定可预测 24 个月时≥5%、≥7%和≥10%体重减轻的变量。
完成电话通话的百分比和减肥饮食行为的变化预测了 24 个月时≥5%（r2=0.16）、≥7%（r2=0.14）和≥10%（r2=0.10）的体重减轻。然而，从基线到 24 个月的身体活动水平的变化仅可预测体重减轻≥10%（r2=0.11）。
行为因素，如采用健康的饮食习惯和电话联系时间，是帮助个体实现≥5%体重减轻的重要组成部分。然而，高身体活动水平在维持≥10%的体重减轻方面起着更为突出的作用。因此，应制定创新策略来增强长期运动依从性。
