The effects of stress on body weight: Biological and psychological predictors of change in BMI
The effects of stress on body weight: Biological and psychological predictors of change in BMI
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DOI：
10.1038/oby.2007.363
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发表时间：
2007-12-01
期刊：
影响因子：
6.9
通讯作者：
Campbell, Iain C.
中科院分区：
文献类型：
--
作者：
Roberts, Cliff;Troop, Nicholas;Campbell, Iain C.
目的：探讨个体差异的压力对BMI.Research方法和程序的影响：参与者是71名健康女性志愿者参加了一所大学的护士执业计划。BMI变化的预测因素被假设为皮质醇分泌、饮食控制、暴食、控制、情绪和饮食态度。测量在学期开始时和12周后在参与者的examinationperiod.Results期间进行：女性体重正常（BMI 25.2 +/- 4.3）为他们的年龄[43;标准差（SD），7]。在检查期间，40人体重增加（平均5.5磅;标准差2.2），19人体重减轻（平均2.5磅;标准差1.5），12人体重稳定。BMI、唾液皮质醇分泌、暴食行为、抑郁和焦虑显著增加，而饮食控制、体重、体型、饮食关注和掌握方面的得分显著下降。回归分析表明，每日皮质醇分泌的变化显着预测体重指数的变化，掌握显着缓和这种关系。然而，饮食限制的减少是这种关系的完美中介。皮质醇分泌的变化也显着预测饮食限制的变化，这是缓和的饮食限制在学期开始。减少饮食限制也预测减少掌握和体重concerns.Discussion：我们确定了个体差异，赋予脆弱性体重增加在紧张的生活事件（饮食限制和掌握）。鉴于女性每天都面临压力，并使用认知策略来限制饮食摄入，提高对压力对饮食行为和体重的作用的认识是一个重要的目标。
Objective: To investigate individual differences in the effects of stress on BMI.Research Methods and Procedures: Participants were 71 healthy women volunteers enrolled in a university-based nurse practitioner program. Predictors of change in BMI were hypothesized to be cortisol secretion, dietary restraint, bingeing, mastery, mood, and eating attitudes. Measures were made at the beginning of the academic semester and 12 weeks later during the participants' examination period.Results: The women were of normal weight (BMI 25.2 +/- 4.3) for their age [43; standard deviation (SD), 7]. By the examination period, 40 had gained weight (mean, 5.5 pounds; SD, 2.2), 19 lost weight (mean, 2.5 pounds; SD, 1.5), and 12 had stable weight. BMI, salivary cortisol secretion, bingeing behavior, depression, and anxiety increased significantly, whereas scores on dietary restraint, weight, shape, and eating concerns, and mastery decreased significantly. Regression analysis showed that change in daily cortisol secretion significantly predicted change in BMI and that mastery significantly moderated this relationship. However, a reduction in dietary restraint was a perfect mediator of this relationship. Change in cortisol secretion also significantly predicted change in dietary restraint, and this was moderated by dietary restraint at the beginning of the academic semester. Reduction in dietary restraint was also predicted by a reduction in mastery and weight concern.Discussion: We identified individual differences that confer vulnerability to weight gain during stressful life events (dietary restraint and mastery). Given that women are exposed to daily stressors and use cognitive strategies to restrain their dietary intake, increasing awareness of the role of stress on eating behavior and weight is an important goal.