I upped my mileage starting in June to include long distance rides a few days of the week... 80, 90, even 100 mile rides. I put in 1000 miles in July, and now, I feel burned out. I did a 68 mile ride today and almost died out there. Does anyone know why this is, and what I can do about it? I don't want to lose the potential adaptations/gains I made, but a 90 miler now just scares me. Ideas for improving recovery?