Postural Changes during Working in Standing Position

Position of the line of gravity of the body, electromyograms of the leg muscles, heart rate and tracking errors were recorded continuously during thirty minutes' pursuit tracking while standing without shifting the foot position in fifteen subjects. Some subjects maintained the line of gravity near a central position over the feet, while some subjects showed shifting of the line of gravity to one foot. The heart rate as a whole increased over time, and this tendency was marked for the subjects who showed little change in the position of the line of gravity. When the amount of the excursion of the line of gravity increased, the heart rate kept its level constant or decreased slightly. The relationship between the heart rate and the shifting of the line of gravity was discussed from the viewpoint of the compensatory mechanisms for the disadvantage in the venous return in the erect posture

Blood pressure · Body position · Cardiology · Excursion · Foot (prosody) · Heart rate · Hemodynamics · Physical medicine and rehabilitation · Position (finance) · Venous return curve · Anatomy · Ergonomics and Musculoskeletal Disorders · Internal Medicine · Medicine · Musculoskeletal pain and rehabilitation