A couple of years ago I did do some serious spinning classes and it definitely helped when the outdoors season came. But since then, even though I still attend the classes once a week or so, I haven't really worked very hard at it. I feel the same way about spinning as I do about treadmills: unbearably tedious.

I also agree about having better outings in warmer weather. It usually takes me a good 20 minutes in cool weather to get really "warmed up" to where the pace starts coming easily, which translates to about 2 miles running or 5 miles riding.