Sitting too much increases the risk of premature death, even in people who exercise, according to a 2012 Australian study of 222,000 healthy adults published in the Archives of Internal Medicine.
The greatest risk was among those sitting for at least 11 hours a day, who were about 40 percent more likely to die over the course of the three-year study than those sitting less than 4 hours a day.
These findings are in line with other research and held true regardless of body weight, age, overall health, smoking status and time spent exercising.
Prolonged sitting can have negative effects, particularly on blood vessel function, HDL (“good”) cholesterol, triglycerides and blood sugar.
Many people spend 90 percent of their waking hours sitting. If you sit for long periods of time, walk for a few minutes every hour or two.