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A mathematical model for constituent ratios of energy expenditure in human

YU Wen-San^1,*, ZHAO Yan-Yan²

¹Department of Nutrition and Food Hygiene, West China School of Public Health, Chengdu 610041, China ；²Department of Pharmacology, West China School of Preclinical and Forensic Medicine, Sichuan University, Chengdu 610041, China

Abstract

In order to assess the constituent ratios of energy expenditure in human, the deductive process of establishing a mathematical model for assessing the constituent ratios of the three major nutrients in energy expenditure in human was described in this paper. Total oxygen consumption, total carbon dioxide output and total nitrogen (urine nitrogen + skin nitrogen) excretion are related to the oxidation of the three major nutrients and the physiological combustion values of the three nutrients are already known. Based on these measurable and known parameters, the mathematical model established by the authors will help understand the characteristics of the tested individual’s energy expenditure.

Key words: energy expenditure; indirect calorimetry; physiological combustion value; energetic nutrients; constituent ratio; mathematical model

Received: 　　Accepted:

Corresponding author: 余文三　　E-mail: wensanyu@tom.com

Citing This Article：

YU Wen-San, ZHAO Yan-Yan. A mathematical model for constituent ratios of energy expenditure in human. Acta Physiol Sin 2006; 58 (2): 189-191