So I have been riding earnestly for the past three years. At 52, I have gradually built myself back up to riding at the level of my bike racing youth, in terms of similar times for similar rides thirty years apart. More "brains over brawn", the actual rides are completely different now. I find that I have been able to will myself over mountains and distances I would never even want to try earlier in my life. I have been eating all real foods, shying away from supplements and the like. I weigh the same as I did when I started riding but have redistributed my mass, mostly to my legs. I try to get at least 500 miles a month in between work and play. Last week I finished a great ride and cleaned and parked my bike. The next morning I was exhausted and was so all day. And the next. I was so tired at work I could hardly do my job. Restless sleep and tired all the day long for a week. No temperature and didn't feel any type of sick. Just exhausted. I tried to get up and go shopping or cook good food but it was all too tiring. I got on my bike for a night ride last night and I admit I feel like it was a much longer ride than it was. But at least I was back on the "horse". Trying to eat five small quality meals a day and get plenty of water. Overtraining ? How long does this last ? I'm kind of done with it. Any secrets to restarting the body? Seems like a setback in my quest of a sub five hour Century. Only have to shave off 22 minutes to get there. I figure that just cutting out a couple of SAG stops alone might get this off the list. And maybe less mountains.