Don't take this as an excuse to plop in front of the TV all day
"As someone whose job is somewhat sedentary, I'm very happy to hear that exercise can undo the ill effects," Dr. Smith adds. "However, let's not let that keep us from looking for opportunities during the workday, or even during commercials while watching TV, to stand and stretch out our muscles." In other words, don't take this study to mean that you should sit as much as possible every day, and as long as you get your hour of physical activity in, you should be A-OK.
Take breaks, take the stairs, take walks, and get up off your butt as often as your work will allow. No matter what, make sure you don't park your carcass on the couch at the end of your workday and wallow in your misery. Getting more physical exercise helps combat stress, weight issues, and improves overall health, and as you've seen from the most recent research, it can help keep you from, you know, dying for no good reason at all. So get moving.