Many of us work at a desk all day, and it's killing us.  Literally.  According to the research referenced in this article, sitting for over six hours a day for a decade could shave seven years off your life!  http://lifehacker.com/5879536/.....ou-can-counteract-it

Luckily there's ways to counteract the problem:

• Stand up and move around at least once an hour
  
• Put in at least 30 mins a day of moderate activity (which can be spread throughout the day)