Direct measurement of total energy expenditure

NUTRITIONAL STATUS303 JUNE 02, 2021

Direct measurement of total energy expenditure

Following methods are used to measure the energy needs of individuals;

Direct calorimetry

Indirect calorimetry

Energy required by living organism for the survival and to carry out daily activities. To produce energy , continuous supply of primarily glucose, fatty acid and oxygen is required. Energy in the from of ATP is produced through oxidative phosphorylation, yielding carbon dioxide (CO2) and water (H2 O).

For the estimation of energy expenditure, direct and indirect calorimeter method are used. In direct calorimeter method, heat production is measured while indirect calorimeter measure the heat exchange i.e. oxygen consumed, and carbon dioxide produced.

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