Growing evidence emphasizes the risk of excessive sitting for adults, but it turns out that they are not the only one at risk as children spend over 60% of their day sedentary. While only an estimate, children sit about 8.5 hours a day.
In addition, it is believed that activity levels decline after the age 8, particularly among girls. A group of researchers decided to do a little research on group of girls to see whether sitting is as harmful to their health as it appears t to be to adults. In adults, excessive sitting constricts the arteries in the legs, which in turn impedes blood flow, increases blood pressure, and leads to development of heart disease over time.
Just Three Hours of Uninterrupted Sitting Reduces Vascular Function
At the beginning of the study, all of the girls had healthy arterial function. But, there was a significant reduction in vascular function after sitting for three hours, watching movies or playing on tablets.