We are pretty hooked up for training at home too. The only thing I attend a class for is yoga. I also do not mind trainer sessions, but we ride outside all winter. We mountain bike regularly in the teens and we have been on the road in the 20's but we have not done that in a while. I have all the gear and then some so it is not bad. I am inside all day in a classroom with no windows, so running and cycling outside in the winter save my sanity.