High School

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------------------------------------------------ Brandon Williamson is walking on a treadmill at 3.6 mph for 30 minutes. His current body weight is 187 lb. His absolute VO2 level at this intensity is 2.3 L/min.

a. Relative VO2 in ml/kg/min

b. MET level

c. Grade of treadmill

d. Kilocalories per minute

e. Total caloric expenditure

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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