"Zone 1-2" Rides
This question is for those of you who use Joe Friel's book(s) as a guide for training. Many base period rides are in Zone 1-2. Being a classic overachiever, I tend to shoot for the middle/high end of Zone 2 for these rides except for my easy weeks. My only concern is, is it important to hit Zone 1 for extended periods, or is it alright to stay in Zone 2?