Why should REE measured by indirect calorimetry be used as the caloric target without addition of stress or activity factors?

Why should REE measured by indirect calorimetry be used as the caloric target without addition of stress or activity factors?

• A. REE measured under steady state conditions closely approximates true 24 hour energy expenditure.
• B. The addition of stress or activity factor is essential to account for illness.
• C. REE is always lower than total energy expenditure.
• D. REE is unaffected by fasting

Answer: (A)

Indicate the body's baseline energy needs by measuring resting energy expenditure (REE) under steady-state, fasting conditions. In a patient whose physiology is stable, this REE value closely mirrors the amount of energy the body would require over a 24-hour period to maintain essential functions. Because that measurement already reflects the current metabolic state, adding stress or activity multipliers would double-count factors that are already influencing the rate, risking overfeeding. Using REE as the caloric target provides a precise, state-specific starting point for nutrition support, with adjustments made only if the patient’s condition changes.

Indicate the body's baseline energy needs by measuring resting energy expenditure (REE) under steady-state, fasting conditions. In a patient whose physiology is stable, this REE value closely mirrors the amount of energy the body would require over a 24-hour period to maintain essential functions. Because that measurement already reflects the current metabolic state, adding stress or activity multipliers would double-count factors that are already influencing the rate, risking overfeeding. Using REE as the caloric target provides a precise, state-specific starting point for nutrition support, with adjustments made only if the patient’s condition changes.