New York: Australians who spent a lot of time sitting at a desk or in front of a TV were more likely to die of any cause during a three-year period than those who were only sedentary a few hours a day, according to a new study.Researchers found that the link between too much time sitting and shortened lives stuck when they accounted for how much moderate or vigorous exercise people got as well as their weight and other measures of health.That suggests shifting some time from sitting to light physical activity -- such as slow walking and active chores -- might have important long-term benefits, researchers said."When we give people messages about how much physical activity they should be doing, we also need to talk to them about reducing the amount of hours they spend sitting each day," Hidde van der Ploeg, the new study`s lead author from the University of Sydney, wrote in an email.Of more than 200,000 adults age 45 and older, van der Ploeg and her colleagues found that people who reported sitting for at least 11 hours a day were 40 percent more likely to die during the study than those who sat less than four hours daily.That doesn`t prove sitting, itself, cuts people`s lives short, she pointed out.Although the researchers also asked participants about a variety of lifestyle habits, there could be other unmeasured differences between people who spend a lot or a little time sitting each day.Still, the findings are consistent with other recent studies suggesting health consequences from too much sitting, said Mark Tremblay, an obesity and activity researcher at Children`s Hospital of Eastern Ontario in Ottawa."Sitting or reclining, especially in front of screens, is bad for you regardless of your age," said Tremblay, who wasn`t involved in the new research.People tend to think they`re okay as long as they get their "dose" of working out each day, he said.But, "Getting your 30 minutes of physical activity five times a week is not insurance against chronic disease," Tremblay added.Instead, time spent doing moderate or vigorous exercise and time being totally sedentary may each affect long-term disease risks separately, he said.
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