Kill Your Television

 Study suggests sitting-to-exercise ratio.

"Researchers also ran the same analysis for time spent on an activity and mortality for TV watching and found that people who watched television three or more hours per day (presumably while sitting rather than being on, say, a treadmill) had a higher risk of mortality for nearly every amount of physical activity except for those in the highest quartile. But even these super active people could tolerate only so much TV time. Those watching television five hours a day or more still appeared to have a significantly increased risk of death as compared to those watching little TV regardless of the amount of physical activity. This implies that watching TV while sitting may somehow be worse for your health than doing a different type of task while sitting and it's something that has researchers find perplexing..."