METHOD FOR DETERMINING ENERGY CONSUMPTION OF HUMAN BODY Russian patent published in 2020 - IPC A61B5/02 

FIELD: medicine.

SUBSTANCE: invention relates to a method for determining energy consumption of an organism using pulsometry and can be used in general hygiene, medicine, as well as in scientific research. Disclosed is a method for determining energy expenditure (EE) of a human body, characterized by the fact that energy expenditure for the main metabolism of the human body to ensure its vital activity, energy expenditure for food thermogenesis, the human body spent on digesting food, and energy expenditure on physical activity is determined in a complex manner by monitoring heart rate (HR) values for the analyzed period of time, including measurement by means of heart rate meter (Heart Rate): resting heart rate, determined in conditions of basic metabolism, bpm; aerobic threshold heart rate, bpm; maximum oxygen consumption per minute, ml/min/kg, as well as human body weight, kg. Total energy expenditure of human body (EE) is calculated for the period of time (T) by formula: where k_min is the number of kilocalories consumed per minute, kcal/min; m_p is human body weight, kg; T is period of time, min. Amount of calories consumed per minute is given by the expression: where a, b are correction factors. To calculate correction coefficients expression is used: where HR_resting is resting heart rate, determined in conditions of basic metabolism, bpm; HR_AT - HR of aerobic threshold, bpm. MOC - maximum body oxygen consumption per minute, ml/min/kg. Calculation of the energy expended on the main exchange - EE_ME performed using formulas (1) and (2) at a constant value of heart rate, given by HR_resting. Calculation of energy expenditure for food thermogenesis (specifically dynamic action of food) is carried out by formula: where T_FD is time spent on food digestion, min; k_mm is the number of kilocalories consumed per minute during the main metabolism is calculated by formula (3) at the HR_resting value, kcal; r - percentage of energy consumption for specific dynamic action of food (depends on human diet, usually default value of this indicator is 15 %). For calculation of energy expenditures spent for physical activity (without taking into account of basic metabolism and energy consumption for specifically dynamic effect of food), formula is used: where τ_EEA is time of performance of type of activity, min; where T_SDAF is the time spent on digestion at run time a certain activity, under normal conditions of T_SDAF = T_EEA, if a person eats evenly throughout the day, min. Determination of total energy expenditures (EE) spent by human body is performed by formula:

EFFECT: invention provides higher reliability of EE test results by complex measurement and calculation of most EE parameters using heart rate monitor.

1 cl, 2 tbl