I don't know what it is. Probably a combination of the "off-season", the chilly weather, the wind, the dark mornings. But I haven't ridden since monday, can't ride fridays, so that will be 4 days in a row off the bike!!!! I never do that, and kinda feel guilty. After all the work I put in this year, I don't want to let my gains slip away. . . Oh well, I probably needed the time off, and I will ride on sat and probably get my butt kicked :-)