I ran into this article, and it basically says what everyone else says about base training and zone 2 training.

http://www.pezcyclingnews.com/defaul...llstory&id=866

The gist of it is, without zone 2 or base training you severely limit your aerobic capacity. I've been trying to find some pubmed abstracts or something that has actually done a study to explain the physiology behind this effect.

Can anyone point me to some studies or explanations backed up by studies?