Well, I can probably rule out a simple case of overtraining. This week, due to weather and scheduling issues, I rode three days in row, and I felt great on the last day (50 mile ride), and felt fine that evening. IOW, if riding too frequently were a problem, I would have been extra tired last night.

Maybe last week I was successfully fighting off a cold?



Yesterday's ride felt great. I've concluded that there's a lot of chance involved in how good I feel on a particular ride. Yesterday was cold, with little or no sun, and some headwind -- all things which I've associated with a ride that makes me tired.

Maybe my training is paying off?