and Metabolic Calculations Exam with verified detailed
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solutions
Define Absolute Oxygen Consumption (Absolute VO2) - correct answer✔✔- rate at which
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oxygen is consumed by whole person ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
- provides estimate of caloric expenditure
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- expressed in L/min (L x min-1) or mL/min (mL x min-1)
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What is the resting absolute VO2 for a 70-kg person? - correct answer✔✔- 0.245 L/min
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What is the max absolute VO2 for a highly trained aerobic athlete? - correct answer✔✔-
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could be as high as 5.5 L/min ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
How do you calculate caloric expenditure based on absolute VO2? - correct answer✔✔1L of
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O2 consumed expends 5 kcals or 20.9 kilojoules
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Define Relative Oxygen Consumption (relative VO2). - correct answer✔✔- rate of oxygen
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consumption relative to body weight ||\\//|| ||\\//|| ||\\//|| ||\\//||
- volume of oxygen consumed per kilogram of body weight every minute
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- expressed in mL/kgmin (mL x kg-1 x min-1)
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- Relative VO2 at given body mass requires same amount of O2 at rest and at any work rate,
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regardless of age, gender, race, fitness level ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
- used to compare VO2 of individuals who vary in size
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higher value is indicative of greater aerobic fitness ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
- All ACSM formulas provide gross relative terms VO2
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,What is the resting relative VO2? - correct answer✔✔assumed to be 3.5 ml/kgmin
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What is the max relative VO2 for a highly trained aerobic athlete? - correct answer✔✔75-80
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mL/kgmin
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Define a metabolic equivalent (MET). - correct answer✔✔- expression of energy
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expenditure or exercise intensity ||\\//|| ||\\//|| ||\\//||
- 1 MET = Relative VO2 at rest or 3.5 mL/kgmin
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can be used to determine initial cycling or walking workloads for cardiac rehab patients
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- allows for easy comparison of VO2 during exercise to VO2 at rest
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How is a MET calculated? - correct answer✔✔Relative VO.5 ml/kgmin
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Define a calorie (kilocalorie). - correct answer✔✔- expression of energy intake and
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expenditure
- commonly used to quantify amount of energy derived from consumed foods
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- also used to determine amount of energy expended at rest and during physical activity
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What is a fat store and how do you lower them? - correct answer✔✔- Most excess energy
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intake is stored as fat ||\\//|| ||\\//|| ||\\//|| ||\\//||
- takes 3500 cals to make and store 1 lb of body weight SO
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- 1 lb of body weight can provide 3500 cals of energy
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walking/running 1 mile expends 100 cals, so one would need to walk 35 miles to lose 1 lb of ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
fat
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, Why is 1 MET (3.5 ml/kgmin) of O2 required at rest? - correct answer✔✔vital amount for
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survival of body's cells, tissues and systems ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
How does physical activity affect VO2? - correct answer✔✔increases VO2 above resting
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requirements
What's the difference between Net VO2 and Gross VO2? - correct answer✔✔- Gross VO2 =
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VO2 + resting VO2 ||\\//|| ||\\//|| ||\\//||
- Net VO2 = gross VO2 - resting VO2
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- Net VO2 used to assess caloric cost of exercise
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both can be expressed in relative and absolute terms
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- ACSM provided values for metabolic formulas are gross VO2 values
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Describe how to convert METs to pounds of fat - correct answer✔✔- METs --> Relative ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
VO2 --> Absolute VO2 --> Kcal/min --> total Kcal --> lbs of fat
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- MET = 3.5 mL/kgmin
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- MET x 3.5 = VO2 mL/kgmin
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- Absolute VO2 mL/min = relative VO2 x kg
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- Absolute VO2 L/min = absolute VO2 mL/min / 1000
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- 1 L absolute VO2 = 5 kcal
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- Kcal/min = absolute VO2 x 5
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- Total Kcals = Kcals/min x total minutes
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- 1 lb = 3500 Kcals
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- Total lbs = total Kcals / 3500
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What is the MET equivalent to 8.75 ml/kgmin? - correct answer✔✔1 MET = 8.75
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mL/kgmin