Jakicic John M, Wing Rena R, Winters-Hart Carena
Brown Medical School/The Miriam Hospital, Providence, RI, USA.
Med Sci Sports Exerc. 2002 Oct;34(10):1653-9. doi: 10.1097/00005768-200210000-00018.
To examine whether change in physical activity is associated with compliance to changes in dietary intake and eating behaviors in an 18-month behavioral weight loss program, and to examine the contribution of exercise to weight loss when these other weight loss behaviors are also considered.
Data from 104 subjects who completed an 18-month behavioral weight loss program were analyzed in this study. All subjects were prescribed a reduced energy (1,200-1,500 kcal x d(-1)) and fat (20 to 30%) diet, and exercise progressed from 100 to 200 min x wk(-1). Subjects attended group behavioral lessons throughout the study. Weight, physical activity, energy intake, and weight loss eating behaviors were assessed at 0 and 18 months.
Body weight decreased 7.8 +/- 7.5 kg and body mass index decreased 2.8 +/- 2.7 kg x m(-2) from 0 to 18 months ( < 0.05). Total energy intake (kcal x d(-1)) and macronutrient intake (g x d(-1)) decreased, whereas physical activity and eating behaviors associated with weight loss increased from 0 to 18 months ( < 0.05). Change in physical activity was significantly correlated with weight loss (r = 0.33), reductions in energy intake (r = 0.20), and improvements in eating behaviors associated with weight loss (r = 0.24) ( < 0.05). Regression analysis indicated that change in physical activity significantly improved weight loss after changes in energy intake and weight loss eating behaviors were considered in the analysis, with R(2)significantly improving by approximately 0.04 ( < 0.05). However, results from multiple regression showed weight loss was influence more by changes in eating behaviors than changes in physical activity (R(2) = 0.17 vs R(2) = 0.04).
The combination of changes in eating and physical activity behaviors can improve long-term weight loss compared with either behavior alone. Interventions targeting both behaviors are recommended for improving long-term weight loss.
在一项为期18个月的行为减肥计划中，研究身体活动的变化是否与饮食摄入量和饮食行为的变化依从性相关，并在考虑其他减肥行为时，研究运动对体重减轻的贡献。
本研究分析了104名完成18个月行为减肥计划的受试者的数据。所有受试者均被规定摄入低能量（1200 - 1500千卡×天⁻¹）和低脂肪（20%至30%）饮食，运动时间从每周100分钟增加到200分钟。在整个研究过程中，受试者参加小组行为课程。在0个月和18个月时评估体重、身体活动、能量摄入和减肥饮食行为。
从0个月到18个月，体重下降了7.8±7.5千克，体重指数下降了2.8±2.7千克×米⁻²（P<0.05）。总能量摄入量（千卡×天⁻¹）和常量营养素摄入量（克×天⁻¹）减少，而与体重减轻相关的身体活动和饮食行为从0个月到18个月增加（P<0.05）。身体活动的变化与体重减轻显著相关（r = 0.33），能量摄入减少（r = 0.20），以及与体重减轻相关的饮食行为改善（r = 0.24）（P<0.05）。回归分析表明，在分析中考虑能量摄入和减肥饮食行为的变化后，身体活动的变化显著改善了体重减轻，R²显著提高了约0.04（P<0.05）。然而，多元回归结果显示，饮食行为的变化对体重减轻的影响大于身体活动的变化（R² = 0.17对R² = 0.04）。
与单独的任何一种行为相比，饮食和身体活动行为的变化相结合可以改善长期体重减轻。建议针对这两种行为进行干预以改善长期体重减轻。
