Here's a bit of an update but more of a, hmm, question, maybe.

Thanks for all your responses, I am finding that if I get out in the sunshine for a walk I do feel a lot better and less tired. Waking up to some sunlight in the morning seems to be helping. I have a light box coming, so I'm going to give it a try. Can't hurt, right? I still think I probably have mild SAD, winter blues I guess they call it.

I'm wondering more and more, though, about this overtraining business. It never really crossed my mind until I posted. . .and I'm having a hard time believing I could have overtrained because I'm only doing 3 hours of workouts a week and I always thought overtraining happened to those 6-7 days/week 1+ hour hardcore athletes. But lately my legs have started feeling heavy and tired when I do pretty basic stuff like walking up the hill to my apartment or walking up the library stairs, and my knee and ankle joints are feeling sore and achy (I've never had this before). It's all pretty darn mild, but noticeable enough for me to question where it's coming from because it feels like each week is a little more noticeable. And it feels different from DOMS.

So at this point I don't know if I should suck it up and stick with my spin classes until they end in a few weeks or take a break. I'm hesitant to take a break because I really really enjoy being active and I already paid for the classes ( Does that make me cheap or something?)

Ugh! Sorry, I guess mainly I'm venting some frustrations.