Originally Posted by
531Aussie
Very short version: former Norwegian pro soccer player, Knut Anders Fostervold, took up cycling and, after training very intensely for a couple years, he did "well". After ~2.5 years of doing lots of 4min zone 5 intervals, he drastically altered his training by cutting his zone 5 stuff heaps, increasing his z4, and more than doubling his time on the bike, almost all of which was done by quadrupling his time in zone 1.
After 18 weeks of his new program, he improved markedly, .
So, what do we think is the
main reason this guy improved? The increased volume? The 'rest' he got from cutting almost all of the z5 intervals? The increase of z4 work? Or a bit of all of the above?