Vo2 Max, OBLA/LT, EPOC Flashcards
What is vo2 max
The maximal amount of oxygen that can be utilised or consumed by the working muscles per minute
What are the physiological affects on vo2 max
- increases maximum cardiac output
- increased myoglobin content
- increased capillarisation around the muscles
- more available oxygen for muscles as the heart uses less
What is the impact of lifestyle on vo2 max
- smoking
- poor diet
- poor fitness
Can all reduce vo2 max
What impacts does body composition have on vo2 max
Higher percentage of body fat decreases vo2 max
What is lactate threshold
LT is a percentage of your vo2 max
What is both average and elite performer lactate thresholds
Average performer = 50,60 percent of their vo2 max
Elite performers = 70,80,90 percent of their vo2 max
What is OBLA
Onset of blood lactate is the point at which lactic acid begins to accumulate in the blood
What is the normal amount of blood lactate in the blood
1-2 mmol/litre
What is the point at which OBLA occurs
4mmol/litre
What is the function of lactic acid
Splits into hydrogen ions and lactate, hydrogen is what makes the muscles acidic causing muscle fatigue
What does lactic acid prevent the breakdown of
Glycogen
What affects lactate accumulation
- exercise intensity
- muscle fibre type- rate of blood lactate removal
- RER
- fitness of the performer
Definition of EPOC
Excess post oxygen consumption, is the volume of oxygen consumed during recovery above that which normally would have been consumed at rest
What are the two major components of EPOC
Alactacid oxygen debit (fast component)
Lactacid oxygen debit (slow component)
What is the fast component of EPOC
- immediate consumption of o2 after exercise
- re-saturate myoglobin with o2
- provides aerobic energy to resynthesises ATP and PC
- completed in 2-3 minutes
- utilised 4 litres of o2
