Check out this article about sitting at work and try to incorporate the practice of frequent “move” breaks.
Even small amounts of activity can make a big difference. According to the Columbia University Medical Center study, a five minute walk every half hour is able to offset many of the harms of sitting.
Aside from the physical benefits to people, short breaks can help uplift one’s mood and help you feel less fatigued. “The human body was not designed to sit for eight hours at a time.”