5.6 Measurements of energy expenditure

Question 1

what are the types of energy expenditure measurments

Answer 1

• indirect calorimetry
• lactate sampling
• VO2 max test
• respiratory exchange ratio

Question 2

what is indirect calorimetry

Answer 2

measures the consumption of oxygen and production of CO2 using a mask and metabolic cart (treadmill)
- can be used at rest or during exercise
- has 2 outcomes: resting energy expenditure, respiratory quotient

Question 3

what is respiratory quotient

Answer 3

VCO2/VO2

Question 4

what is respiratory energy expenditure

Answer 4

how much energy is used at rest - tells you how much to eat

Question 5

what is Basal Metabollic Rate (BMR)

Answer 5

the minimum amount of energy required to sustain essential physiological functions

Question 6

what is the thermic effect of food

Answer 6

energy required to eat, digest and absorb food

Question 7

what does energy expenditure =

Answer 7

BMR + thermic effect of food

Question 8

what is metabolic equivalent value

Answer 8

method of calculating expenditure if activities

Question 9

what is lactate sampling

Answer 9

involves measuring the level of lactate in the bloodstream
- can be taken to understand at what point during exercise OBLA occurs
- done by taking a blood sample (very accurate)

Question 10

what is the respiratory exchange ratio

Answer 10

the ratio of carbon dioxide produced compared to oxygen consumed in order to measure a performer’s reaction to exercise
- close to 1 = carbs
- close to 0.7 = fats
- measures the ratio of CO2 released to oxygen consumed

Question 11

what is the VO2 max test

Answer 11

carried out on a treadmill or other cardiovascular equipment, used to calculate the maximum amount of oxygen that can be consumed per minute