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This is ideal for resting measurements made on a couch over a period of 20 minutes or more. 3.Gas concentrations can be measured at the air inlet and outlet of a ventilated room. This is equations ideal for measurements lasting from equations overnight to several days. Measurement response time is sacrificed as the measurements become less intrusive to the subject. Whilst a mask will allow measurement over 5 minutes of exercise and a hood over 20 minutes of rest, room calorimetry will measure energy expenditure with useful precision over one hour of rest equations or 30 minutes of exercise. However, over a day, a room calorimeter can measure fat oxidation to an accuracy of ±10g and carbohydrate oxidation to ±20g, making it the ideal environment for metabolic balance studies in obesity research. Murgatroyd, P. R., P. S. Shetty, et al. (1993). “Techniques for the measurement of human energy expenditure: a practical guide.” International Journal of Obesity 17: 549-568. Elia, M. and G. Livesey (1992).
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