Originally Posted by
GhostRider62
Why not?
Because all those Type 2A fibers that you spent so much time and effort converting for endurance riding will convert back to 2B. Sprint will improve but endurance will decline somewhat aside from endurance lost due to riding less and focusing on sprint workouts.
I found that I could improve my sprint power significantly (like a few hundred watts improvement) from minimal sprint intervals without any detriment to my endurance. This is in the context of not doing any sprint training whatsoever vs maybe one half hour session per week (or even every couple of weeks). As I understand it, the quick gain comes largely from improved muscle coordination rather than going as far as converting muscle fibres. I'm not talking about doing loads of dedicated sprint training here, where there may well be some kind of trade-off. It's just a quick boost for someone who mainly focuses on endurance riding.