I have a wife and two boys. One is 18 and the other is 14. The 18-year old is getting ready for college next year and he made a decision to run track. He runs a lot like Michael Johnson.
The problem with New Year's resolutions - and resolutions to 'get in better shape' in general, which are very amorphous - is that people try to adopt too many behavioral changes at once. It doesn't work. I don't care if you're a world-class CEO - you'll quit.