1) Get a personal trainer. Not one from a gym, one that specializes in coaching cycling athletes. Your training time isn't effective if it isn't done properly.
2) 14-15 hours isn't much. I'm pretty sure my trainer had me doing 15-20 hour weeks when I was a 15 year old junior listed as a cat 3 track and cat 4 road.
Now that I don't even have 10 hours per week to dedicated to cycling, I don't compete anymore.
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It's like riding a bicycle