Changing position often can help keep you from getting “stiff as a board.” Frequent changes in position can also help you maintain a wide range of motion and good flexibility.
If you sit most often then try standing, sit on the floor with your legs crossed, or sink into a deep squat-stretch. Sinking into these position changes can help unlock muscle tightness around the hips and core.
If you stand most often, take a break to sit and relax. A chair with good back support can help decrease inter-vertebral pressure in the spine, helping to relieve tension in the back.