Winter in Maine is a funny thing. One day we will get a foot of snow, wild winds will knock down mighty pines, and jack frost himself, complains of the chill. The very next day, 50 degrees, sun shining, snow melting into small ponds that freeze into ice rinks over night. On those nice days, you just want to go out and play but can't because everything is so wet.
Exercise gets to be redundant. I love karate class, because it is always changing up to learn new things, however morning workouts, are just a chore. Which is why I LOVE Tabata intervals. 4 minutes of hell and you are all done, and with the cardio conditioning of an hour of 2 minute intervals.