Question

How long would it take our subject to burn 550 kcal (equivalent of a McDonald’s Big...

How long would it take our subject to burn 550 kcal (equivalent of a McDonald’s Big Mac) at the steady state exercise intensity

a)    How many kcal of fat would be burned during this exercise bout (1 pt)?

b)    How many kcal of carbohydrates would be burned during this exercise bout (1 pt)?

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Answer #1

SOLUTION:

How long would it take our subject to burn 550 kcal (equivalent of a McDonald’s Big Mac) at the steady state exercise intensity .
ANS: Total Cost= Energy Expenditure x minutes

550kcal= 13.4kcal x min

Min= 550kcal/ 13.4kcal= 41.04 minutes

a) How many kcal of fat would be burned during this exercise bout (1 pt)?

b) How many kcal of carbohydrates would be burned during this exercise bout (1 pt)?

ANS: RER= .93 ? 4.961kcal/

L RER= .93 ? 77.4% CHO, 22.6% FAT

4.961kcal/L x 2.7L/min x 4min= 53.58 or 54kcal

FAT= 54kcal x .226= 12.2 kcal

CHO= 54kcal x .774= 41.8 kcal

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