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Answer :
Brandon Williamson is walking on a treadmill at 3.6 mph for 30 minutes. His current bodyweight is 187lb. His absolute VO₂ level at this intensity is 2.3 L/min.
a. Relative VO₂ in ml/kg/min = 0.027 L/kg/min
b. MET level = 7.7 METs
c. Grade of treadmill = not given in the problem
d. Kilocalories per minute = 0.968 kcal/min
e. Total caloric expenditure = 29.04 kcal
The formula for relative VO₂ is:
Relative VO₂ = Absolute VO₂ / body weight in kg
For the purpose of this problem, we need to convert the body weight of Brandon Williamson from lb to kg.1 lb = 0.45 kg Therefore, the body weight of Brandon Williamson in kg = 187 lb x 0.45 = 84.15 kg
Now we can calculate the relative VO₂: Relative VO₂ = 2.3 L/min / 84.15 kg= 0.027 L/kg/min. One MET is the resting metabolic rate, which is equivalent to 3.5 ml of oxygen uptake per kilogram of body weight per minute.
MET level = Relative VO₂ / 3.5= 0.027 L/kg/min / 3.5 ml/kg/min= 7.7 METsc.
Therefore, the final answers are:
a. Relative VO₂ in ml/kg/min = 0.027 L/kg/min
b. MET level = 7.7 METs
c. Grade of treadmill = not given in the problem
d. Kilocalories per minute = 0.968 kcal/min
e. Total caloric expenditure = 29.04 kcal
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