A novel approach to calculating the thermic effect of food in a metabolic chamber.
A novel approach to calculating the thermic effect of food in a metabolic chamber.
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DOI：
10.14814/phy2.12717
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发表时间：
2016-02
影响因子：
2.5
通讯作者：
Tokuyama K
中科院分区：
文献类型：
--
作者：
Ogata H;Kobayashi F;Hibi M;Tanaka S;Tokuyama K
食物的热效应（TEF）是众所周知的概念，尽管它很难测量。评估TEF的金标准是进食和空腹状态之间的能量消耗差异（ΔEE）。或者，从能量消耗和体力活动之间的线性关系的截距估计0活动时的能量消耗（EE 0），以从测量中消除活动产热，并将TEF计算为EE 0与吸收后静息代谢率（RMR）或睡眠代谢率（SMR）之间的差异。然而，替代方法的准确性受到质疑。为了提高TEF估计，我们提出了一种新的方法作为我们原来的TEF计算方法，计算EE 0使用综合体力活动在特定的时间间隔。我们旨在确定TEF计算的替代方法返回合理的估计值，即正值以及接近ΔEE的估计值。七名男性参与了两次全身间接热量测定（有早餐和无早餐），并使用三轴加速度计监测身体活动。将三种简化方法的TEF估计值与ΔEE进行比较。ΔEE，EE 0高于SMR，我们的原始方法在所有测量中均返回早餐后TEF的正值。我们的原始方法的TEF估计值与基于ΔEE的估计值没有区别，而EE 0高于RMR和EE 0高于SMR的估计值分别略低和略高。我们的原始方法是三种简化TEF方法中最好的，因为它在所有测量中提供了接近所有测量的金标准值的正估计值。
The thermic effect of food (TEF) is the well‐known concept in spite of its difficulty for measuring. The gold standard for evaluating the TEF is the difference in energy expenditure between fed and fasting states (ΔEE). Alternatively, energy expenditure at 0 activity (EE 0) is estimated from the intercept of the linear relationship between energy expenditure and physical activity to eliminate activity thermogenesis from the measurement, and the TEF is calculated as the difference between EE 0 and postabsorptive resting metabolic rate (RMR) or sleeping metabolic rate (SMR). However, the accuracy of the alternative methods has been questioned. To improve TEF estimation, we propose a novel method as our original TEF calculation method to calculate EE 0 using integrated physical activity over a specific time interval. We aimed to identify which alternative methods of TEF calculation returns reasonable estimates, that is, positive value as well as estimates close to ΔEE. Seven men participated in two sessions (with and without breakfast) of whole‐body indirect calorimetry, and physical activity was monitored with a triaxial accelerometer. Estimates of TEF by three simplified methods were compared to ΔEE. ΔEE, EE 0 above SMR, and our original method returned positive values for the TEF after breakfast in all measurements. TEF estimates of our original method was indistinguishable from those based on the ΔEE, whereas those as EE 0 above RMR and EE 0 above SMR were slightly lower and higher, respectively. Our original method was the best among the three simplified TEF methods as it provided positive estimates in all the measurements that were close to the value derived from gold standard for all measurements.