New research challenges claims that sitting for long periods of time is hazardous for your health even if you are otherwise physically active, Mashable reported.
Researchers from the University of Exeter found that, contrary to previous studies, sitting, either at home or at work, is not associated with an increased risk of dying. Importantly, the findings contradict NHS recommendations which state that remaining seated for too long is bad for your health, regardless of how much exercise you do.
"Policy makers should be cautious in recommending a reduction in the time spent sitting without also promoting increased physical activity," researcher Dr. Melvyn Hillsdon said in a statement. "Our study overturns current thinking on the health risks of sitting and indicates that the problem lies in the absence of movement rather than the time spent sitting itself. Any stationary posture where energy expenditure is low may be detrimental to health, be it sitting or standing."
For the study, researchers collected and analyzed data from more than 5,000 people. This data included information on total sitting time and on four other specific types of sitting behavior (sitting at work; during leisure time; while watching TV; and sitting during leisure time excluding TV) as well as details on daily walking and time spent engaged in moderate to vigorous physical activity. Age, gender, ethnicity, socioeconomic status, general health, smoking, alcohol consumption and diet were all taken into account.
Researchers found that over the 16 year follow-up period none of these five sitting measures influenced mortality risk, CTV News reported.
"Our findings suggest that reducing sitting time might not be quite as important for mortality risk as previously publicized and that encouraging people to be more active should still be a public health priority," Dr. Richard Pulsford, lead author of the study, said in a statement.
These findings challenge previous research that suggest the act of sitting itself causes harm even when people routinely walk a lot or do other exercise.
"The results cast doubt on the benefits of sit-stand work stations, which employers are increasingly providing to promote healthy working environments," Hillsdon said.
Future work will consider whether long periods of sitting are associated with increased incidence of diseases such as heart disease and type II diabetes, and will investigate the biological mechanisms that underpin previously observed associations between sitting time and health outcomes.
The findings are detailed in the International Journal of Epidemiology.
