For me it's spinning. I did 3-4 classes last year all winter and it really helped me stay in biking shape. This year however I've committed to teaching the class at 5:45 a.m. (I'm nuts) so I don't have any excuses!

I'm also starting tri training this fall and will be swimming, running and weight training. Hopefully will be able to bike through Dec, we'll see how the weather cooperates!