If you're reading this sitting down, do yourself a favor: Stand up. Movement is life! Note, that a huge amount of research confirms the fact that a sedentary lifestyle leads to a weakening of the body, disease and early death. If the body no activity, so it no needed - that how organism thinking. And even more, the same study (you can check recommendations for each disease separately) suggest that prevention and treatment of diseases (except for very severe cases) requires activity. For example, treatment for joint by complete dormancy will not lead to the desired result.
     Some no direct scientific findings* that prolonged sitting (inaction) cause nervous excitability (Anxiety). Experiment by Robert Restaino, a doctoral student at the University of Missouri, in Columbia, Mo. published recently in the journal Experimental Physiology, shown that after six-hour sitting reduced blood flow in two major leg arteries and the men's calves swelled by almost an inch, on average.