VO2 Flashcards
True/False: The higher the muscle mass, the higher the VO2max
True
True/False: Cardiac output is a main determinant of VO2max
True
Oxidation of Carbs, Fat Oxidation, Phosphocreatine, Anaerobic Glycolysis
Order the energy stores from smallest to largest
- Phosphocreatine
- Anaerobic Glycolysis
- Oxidation of Carbs
- Oxidation of Fat
Rank the energy stores in order of how quickly they produce energy
Quickest to slowest
- Phosphocreatine
- Anaerobic Glycolysis
- Oxidation of Carbs
- Oxidation of Fat
What effects the arterial mixed venous oxygen difference?
- Capillary number
- Capillary recruitment
- Mitochondria
- Oxidative enzymes
- Myoglobin
What limits VO2max and why?
Oxygen delivery or Oxygen utilisation
Oxygen delivery, during a maximal 2-legged exercise the maximum O2 extraction was less than that of the one-legged exercise
How did removing the pericardium around the heart affect VO2max, Q and SV?
All increased as the heart could expand greater
Why do males have a higher value for the same category of CV fitness classifications?
Females have a higher fat %age so less active muscle mass per kg of body mass
At what age does VO2max begin to roughly decrease by 1% every year?
25
True/False: Genetics account for 25-50% of variance in VO2max
True, a world-class distance runner has a VO2max of around 85ml/kg/min
What is the primary criterion of VO2max?
A plateau in VO2 despite load/speed increase to the next stage but this is only found in 40-50% of people
What are the secondary criteria of VO2max?
- HR within 90% of max
- BLa > 8 mmol/L (Indicates large contribution of anaerobic metabolism)
- RER > 1.15 (Indicates large contribution of anaerobic metabolism)
- RPE > 19
Not all individuals display all criteria
What do you call the highest VO2 if they don’t pass all the criteria?
VO2peak, indicates the peak oxygen uptake reached in the test
