Newton's First Law (kind of)

Today was a slow day at work and I spent most of it at my desk.  I was worn out and tired by the time I arrived home and didn't feel like doing anything, despite the fact that I hadn't really done anything.  Eventually I forced myself to hop on the treadmill and run just under 4 miles.  While running I started thinking about how much more difficult it is to find the motivation to run after a day of sitting still, which lead me to Newton's first law.  To paraphrase, a fat ass at rest tends to stay at rest.  This couldn't be more true.  I have to constantly remind myself that once I get out there and do something I will enjoy it, I just need to have the inspiration to get off my butt and get moving.