aerobic training Flashcards
what is VO2 max most highly correlated with
max cardiac output (MCO)
- dependent on the capacity to send O2 blood to active tissue
(improves with aerobic training)
- higher the aerobic fitness, the greater the MCO
what does MCO depend on
greater SV and lower HR at a given sub max workload after aerobic training
(max HR is unchanged regardless)
- capacity to send O2 blood per stroke is improved
what happens to VO2 max and MCO after a blood draw
reduced VO2max
MCO back to pre training levels
- less capacity to send O2 blood
what muscle variables help increase VO2 max
better blood flow support to the muscle
greater blood volume and redistribution within the muscle
what muscle adaptations occur with aerobic training
- greater capillary to fibre ratio
- better redistribution of blood flow to exercising muscle
- shorter transit time for gas exchange - easier and faster at muscle level
- greater intramuscular fat storage (fat as a energy source within muscle)
- greater fat utilisation during submax exercise
what happens to mito volume density and enzyme activity after aerobic training
increase
mainly enzymes related to fat oxidation increase
decrease very quick with detraining
what are the physiological limitations of VO2 max in trained individuals
limiting factor = CV system
mito activity + volume is very high
LACKS O2 supply
what are the physiological limitations of VO2 max in UNtrained individuals
limiting factor = mito
lack mito respiration capacity
MORE O2 supply than needed
what is the correlation between whole body VO2 max and mito max respiration changes based on training status
trained = no correlation
untrained = strong correlation
how does the location of density of mito change with aerobic training
less density in muscle fibres
more density of mito around capillaries (easier O2 transfer)
