In this paper energetical expenditure of a man is decribed clearly and individual components and factors which can influenced it are specified. The question of the total organisms? energetical expenditure balance and influence of energy intake change to the amount of energetical expenditure is discussed.
The most used formulas are mentioned in the paragraph about energetical expenditure calculation. The last part of the paper deals with methods which are used for measuring or estimating energetic expenditure of organisms.
The advantages, limitation or technical difficulties are also discussed.