Due to the industry I am in, I spend all day on my feet doing manual labour. It is beneficial to my heart, lungs, psyche, and everything else. I consider it quite silly that spending hours on the computer during off-time would negate that. If the subjects got about the same amount of exercise but the ones who used computers and TVs had more heart problems, I must ask, what did the other people do? Since they could not be exercising, they would be sitting. What is the difference between sitting while reading, writing, or playing a board game and sitting while watching a screen? What, exactly, does a TV or computer do to increase the risk of heart problems? I think there is something the study missed.