No.  Research suggests that short activity breaks, such as a walk around the house, can counteract the potential health consequences of prolonged sitting, which include a higher risk of type 2 diabetes, and of death from cardiovascular disease and cancer. In one study, researchers found that instruction helped older adults reduce daily sitting time by 27 minutes, which may improve how the body processes blood sugar and reduce waist size. As a reminder to move, set an alarm on your smartphone or watch, or set a kitchen timer.

Source:  Consumer Reports on Health August 2015