Carels Robert A, Darby Lynn A, Rydin Sofia, Douglass Olivia M, Cacciapaglia Holly M, O'Brien William H
Department of Psychology, Bowling Green State University, OH 43403, USA.
Ann Behav Med. 2005 Dec;30(3):182-90. doi: 10.1207/s15324796abm3003_2.
BACKGROUND/PURPOSE: During a behavioral weight loss program (BWLP), weight loss and exercise can vary considerably from week to week. Weekly fluctuations in outcome expectancies and perceived difficulties with eating and exercise may be associated with weekly variability in weight loss and exercise. Also, inconsistent self-monitoring of exercise may be associated with poor weight loss and physical activity treatment outcomes.
Forty obese, sedentary participants completed a 6-month BWLP. Body weight, outcome expectancies, and difficulties with eating and exercise were assessed weekly. Weekly self-monitoring of exercise was computed from physical activity diaries. Physical activity, VO2max, and caloric intake were assessed pre- and posttreatment.
Within-subjects analyses indicated that participants exercised less during weeks that participants reported greater difficulties with exercise, relative to weeks participants reported fewer difficulties. Participants lost significantly more weight during weeks that participants reported more positive outcome expectancies and greater difficulties with exercise, compared to weeks participants reported less positive outcome expectancies and fewer difficulties with exercise. Consistent self-monitoring of exercise was associated with fewer difficulties with exercise and greater exercise and weight loss.
Interventions that are targeted to increase self-monitoring and to improve transient difficulties with exercise and diminished outcome expectancies may improve BWLP treatment outcomes.
背景/目的：在行为减肥计划（BWLP）期间，每周的体重减轻和运动量可能会有很大差异。结果期望以及饮食和运动方面的感知困难的每周波动可能与体重减轻和运动的每周变异性有关。此外，运动自我监测不一致可能与减肥效果不佳和身体活动治疗结果有关。
40名肥胖的久坐不动参与者完成了为期6个月的BWLP。每周评估体重、结果期望以及饮食和运动方面的困难。根据身体活动日记计算每周的运动自我监测情况。在治疗前后评估身体活动、最大摄氧量和热量摄入。
受试者内分析表明，与报告较少困难的周数相比，参与者在报告运动困难较大的周数内运动较少。与报告结果期望不太积极且运动困难较少的周数相比，参与者在报告结果期望更积极且运动困难较大的周数内体重减轻显著更多。持续的运动自我监测与较少的运动困难以及更多的运动和体重减轻有关。
旨在增加自我监测并改善运动方面的短暂困难以及降低结果期望的干预措施可能会改善BWLP的治疗效果。
