Dériaz O, Tremblay A, Bouchard C
Physical Activity Sciences Laboratory, Laval University, Ste-Foy, Québec, Canada.
Obes Res. 1993 May;1(3):179-85. doi: 10.1002/j.1550-8528.1993.tb00609.x.
This study deals with the pattern of body weight gain during an overfeeding period with a constant energy intake, in order to assess whether total daily energy expenditure (TEE) increased with body weight and thus could account for the progressive slow down in body weight gain over time. Twenty-four young adult males (12 pairs of identical twins) were overfed by 4.2 MJ per day, six days a week, for a total of 84 days during a 100-day overfeeding period. The total excess amount each man consumed was 353 MJ. It was assumed that, at a given time, the TEE increase (E) was dependent on body weight gain and energy cost (C) was proportional to the daily body weight gain. Results show an exponential increase in body weight, fat free mass, and fat mass (with half-times of 86, 57, and 84 days, respectively) that allows the calculation of E (246 +/- 37 kJ x kg(-1) x d(-1), mean +/- SE) and C (32.3 +/- 2.4 MJ x kg(-1)). Energy expenditure from other sources besides resting metabolic rate, such as physical activity and thermic effect of food, may represent as much as 65% of E. At the beginning of the overfeeding period, almost all the energy surplus was recovered as body substances but this proportion decreased to 60% after 100 days of overfeeding. It is concluded that 1) TEE changes were related to body weight change, 2) about 65% of E were accounted for by physical activity, thermic effect of food, or some other components, and 3) the fraction of the energy surplus stored as body substances decreased with the duration of overfeeding.
本研究探讨在能量摄入恒定的过度喂养期间体重增加的模式，以评估每日总能量消耗（TEE）是否随体重增加，从而解释随着时间推移体重增加逐渐减缓的现象。24名年轻成年男性（12对同卵双胞胎）在为期100天的过度喂养期间，每周6天，每天多摄入4.2兆焦耳的能量，共持续84天。每人摄入的总多余能量为353兆焦耳。假设在给定时间，TEE的增加（E）取决于体重增加，而能量消耗（C）与每日体重增加成正比。结果显示体重、去脂体重和脂肪量呈指数增长（半衰期分别为86天、57天和84天），据此可计算出E（246±37千焦·千克⁻¹·天⁻¹，平均值±标准误）和C（32.3±2.4兆焦耳·千克⁻¹）。除静息代谢率外，其他来源的能量消耗，如身体活动和食物的热效应，可能占E的65%。在过度喂养期开始时，几乎所有的能量过剩都以身体物质的形式储存，但在100天的过度喂养后，这一比例降至60%。研究得出以下结论：1）TEE的变化与体重变化有关；2）约65%的E由身体活动、食物热效应或其他一些成分所消耗；3）作为身体物质储存的能量过剩比例随过度喂养时间的延长而降低。
