Would direct calorimetry be a practical way to measure metabolic rate?

Although direct calorimetry is considered to be the most precise technique for the measurement of metabolic rate, construction of such a chamber that is large enough for doing exercise physiology research (or any research for that matter) is extremely expensive and not at all mobile.Click to see full answer. Moreover, how is direct calorimetry measured?Direct calorimetry measures the heat production of an individual, in calories, when placed in an insulated chamber where the heat is transferred to surrounding water. This is a very accurate method of measuring energy expenditure.Subsequently, question is, how do direct and indirect calorimetry differ? Direct calorimetry measures the heat output by the subject, through direct observation inside a calorimeter. Indirect calorimetry measure heat by using the variable of O2 consumption and manufactured CO2. Indirect calorimetry gives a more feasible and accurate measure of heat or energy, compared to direct calorimetry. Hereof, which calorimetry method is considered to be the most accurate? The direct calorimetry technique measures the rate of heat loss by the subject using a calorimeter. It is the most accurate method for quantifying metabolic rate [39], but its use is limited by the high cost.What is direct and indirect calorimetry in sport?While direct calorimetry is achieved through direct measurement of total body heat produced, such as via a thermally sealed chamber, indirect calorimetry measures respiratory gases, i.e. oxygen (O2) and carbon dioxide (CO2) that are influenced by metabolism to meet energy requirements (Figure 1).