Here's a great excuse.

I have a sweet friend (I really do love her) who said she would have to get a whole new wardrobe to exercise! She also doesn't want to appear like she needs to exercise (which blows my mind)! I've mentioned exchanging the word 'exercise' with 'sport' because here in Minnesota winter provides so many options. I have snowshoes, cross-country skiis and I still bike in the winter, even when the temperature drops to zero (off-road in the snow with spiked tires and lights). Personally, I also think that people like to cocoon and nest when it gets dark and cold out and that turns into a lifelong habit.