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14 Cards in this Set
- Front
- Back
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1 kcal =
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4. kilojoules
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1 kilojoule =
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0.239 kcal
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gross energy
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the kcal obtained from bomb calorimeter. It has not yet been corrected for the amount of energy lost in the stools or that part not physiologically available to the body.
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is measured when a body is at rest under less rigorously controlled conditions.
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REE
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BEE measuring conditions
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after 12 hr fast
resting after waking up neutral temps |
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quick method of BEE
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1 kcal/kg/hr
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probelm with harris benedict
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may overestimate needs
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Total Caloric Requirements (when using BEE) equal
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BEE multiplied by (stress factor + PA)
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3 ways to calculate BEE
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mifflin
quick method harris benedict |
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What is the most important determinant of BEE?
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LBM
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PA usually accounts fo __ precent of kcal needs
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15-20%.. highly variable
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TEF accounts for what percent?
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7-10% of energy expenditure.
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direct calorimetry
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subject placed in water and the raise in temp is recorded. equivalent to energy expenditure.
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indirect calorimetry determined from
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measuring the inspired and expired volumes.Then taking the ratio.
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