Unhealthiness of Sitting Not Offset by Exercise: Meta-Analysis | Medpage Today

Greater sedentary time was associated with increased risk of adverse health outcomes including early death, even in those who otherwise exercised regularly, a meta-analysis indicated.

With data pooled from 41 primary research studies, researchers found that long periods of sitting time were positively correlated with all-cause mortality and other outcomes, after adjustment for levels of physical activity, compared with study participants reporting relatively little sitting time....

The risk was generally greater at lower levels of physical activity, according to David A. Alter, MD, PhD, at University Health Network in Toronto, and colleagues, writing in the Jan. 20 issue of Annals of Internal Medicine....

[In an accompanying editorial, commenters Brigid M. Lynch, PhD, and Neville Owen, PhD, of the Baker IDI Heart and Diabetes Institute in Melbourne, note that] it's not clear how much sedentary behavior puts a person at risk for chronic disease...

[Commenter Barry Franklin, PhD, director of the Cardiac Rehabilitation Program at William Beaumont Hospital in Royal Oak, MI,] said he thinks that the dangers of sitting should still be part of public health messaging[:] "When we talk about healthier diets, when we talk about no smoking, when we talk about a regular exercise program, we should also be including avoiding prolonged sedentary behaviors, sitting in front of a computer for hour after hour after hour."