Energy Expenditure (EE): Indirect Calorimetry (2005-2006)
You've decided that an individual requires measurement of resting metabolic rate (RMR).
How do you obtain the most accurate measurement of RMR?
An accurate RMR measure is more than just a 10 minute measure. Instructions on how to best obtain a measure occur at three different times in the process.
First, after consenting to an indirect calorimetry, what is important to explain to a patient or client measure prior to being measured?
- What are the thermic effects of different foods?
- How do different types of physical activity prior to a measure influence RMR?
- How do different medications affect RMR?
Second, on the day of the measure, what is important to guide and monitor?
- How does resting period length affect RMR?
- What are the differences between various gas collection devices?
- What measurement intervals provide the most accurate measurement of RMR?
- How many times in a 24-hour period are necessary to obtain an accurate RMR measurement?
- How can respiratory quotient be used to detect measurement error?
- What do you need to know about steady state measurement conditions?
- What environmental factors influence RMR?
Third, after the measure, what other factors assessed and monitored within the nutrition care process that are important to consider?
- How does an individual's RMR fluctuate over time?
- How do hormones affect RMR?
- What physical activity factors should be added to RMR?