Which of the following methods can be used to measure energy expenditure for up to three weeks?
A)direct calorimetry
B)indirect calorimetry
C)doubly labeled water
D)dual-energy x-ray absorptiometry (DXA)

Question

Quizplus · Accepted Answer

Doubly labeled water is a method where the individual drinks water containing isotopes of both hydrogen and oxygen that are not metabolized by the body. The rate of elimination of the isotopes through urine over a period of up to three weeks can then be used to measure energy expenditure. This method is safe and non-invasive, making it suitable for longer-term studies. Direct calorimetry and indirect calorimetry measure energy expenditure in the short term (hours) and are not suitable for longer studies. Dual-energy x-ray absorptiometry measures body composition and not energy expenditure.

Which of the Following Methods Can Be Used to Measure