For what it's worth, taking proper recovery time is just as important as working out.
If you're working out hard every day, you're not giving your legs a chance to recover and rebuild themselves.
Try a day-on-day-off regime and see how that goes.
Also, diet plays a BIG part of it. You're going to need energy for biking, usually in the form of carbs. The night before hill climbs, we'd have plates and plates of pasta, and would drink energy drinks during the race... made a HUGE difference.
Be sure you're eating enough energy to sustain what you're doing.
That being said, I'm old and fat now, so take that with a grain of salt.
