Sitting is a rest position supported by the buttocks or thighs where the torso is more or less upright. Recreational sitting, as reflected by television/screen viewing time, is related to raised mortality and cardio vascular disease (CVD) risk regardless of physical activity participation. Inflammatory and metabolic risk factors partly explain this relationship
Standing is a human position in which the body is held upright and supported only by the feet, referred to as an orthostatic state. Although standing per se is not dangerous, there are pathologies associated with it. One short term condition is orthostatic hypotension, and long term conditions are sore feet, stiff legs and low back pain.