“Being sedentary for nine hours a day at the office is bad for your health whether you go home and watch television afterwards or hit the gym. It is bad whether you are morbidly obese or marathon-runner thin. It appears that what is critical and maybe even more important than going to the gym, is breaking up that sitting time.”
http://www.smh.com.au/lifestyle/life/sitting-is-the-new-smoking-20130529-2nca0.html