How long would it take someone who is just starting cycling to reach their full potential in terms of endurance and speed on a bike? Assume the person wasn't doing much activity before they started cycling and they start following a decent training program based on the Training Bible or Chris Carmichael's program or something like that.
I know the immediate results would be quick and then improvements would start to slow down. I'm wondering how much fitter and faster a person would be after a year vs. after six months? And if gains would continue to be seen in years 2, 3, 4, etc? (assuming that we compare at the same point in their training program, e.g. their peak).