ISLAMABAD: Sedentary behavior can raise the risk of heart disease, diabetes, and other conditions, even among people who are physically active. This is according to a new scientific statement from the American Heart Association.
Deborah Rohm Young, Ph.D., chair of the AHA statement and director of behavioral research at Kaiser Permanente Southern California, and colleagues reached their findings after conducting a review of the current evidence on sedentary behavior. 
The authors explain that sedentary behaviors normally have an energy expenditure of 1.5 metabolic equivalents (METs) or less. Slow, leisurely walking or light housework uses around 2.5 METs, while vigorous to moderate physical activity uses around 3 METs or more. 
Based on current evidence, Young and colleagues found that spending too much time sitting may raise the risk of impaired insulin sensitivity, diabetes, cardiovascular disease, and all-cause death. 
What is more, the review revealed that these risks are not reduced by moderate to vigorous physical activity, suggesting that prolonged sitting is harmful to health, regardless of how much one exercises. 
Young says that, at present, they are unable to pinpoint exactly how long is too long when it comes to sitting, but for now, their advice is to reduce the amount of time spent sedentary and increase the amount of time spent active. 

"There's a lot of research that we need to do. This statement is important because it starts the ball rolling and suggests sedentary behavior may play an important role in heart health and more. 
But, it's too early to make conclusive recommendations other than to encourage Americans to 'sit less, move more.'"

Deborah Rohm Young, Ph.D.
In line with the AHA's physical activity guidelines, the authors recommend engaging in around 30 minutes of moderate to vigorous physical activity daily; they note that exercising in smaller amounts each day is more beneficial than trying to fit in the same amount of exercise in fewer days.