Originally Posted by Roadie_scum .
Quote:
Originally Posted by daveryanwyoming I guess we'll be beating this dead horse well into the next century, but it's highly unlikely that either your heart or your lungs are limiting your performance in any way. Heart stroke volume increases are one of the fastest and earliest adaptations to endurance training and if you've been riding with any regularity (gotta guess you have been if you're doing L5 intervals) then that particular adaptation has long since happened. And short of some serious respritory issues it's very unlikely that your lungs are a limiter.
The limiter is almost always in the working muscles themselves (your legs) and in the O2 transport (hence the incentive to blood dope) but not your lungs or your heart.
Dave I like 'most all of what you say all the time so sorry to quibble, but the heart is intimately connected with O2 transport. Peak cardiac output is a strong determinant of VO2max, which puts a ceiling on aerobic workload. (I'm sure you already know this... but it isn't evident from your phrasing).
More subtle:
(i) Early adaptation of a parameter (eg cardiac output) does not mean that parameter is not a limiter to exercise capacity.
(ii) Early adaptation is not the same as maximisation.