I was fortunate enough to be able to go cross country skiing with my son's class last week. What a great experience! I had forgotten how great it was to just get out and do something. It wasn't too cold and I was over dressed so I sweated profusely, but the exercise got my heart going and I felt great for the rest of the day.
Now I know that exercise is good for me, I went to the gym for an hour every day for 3 months and felt great, however I let that slide when I last changed jobs as I didn't have the old job as a motivation to go to the gym any more.