Abstract
The purpose of this study was to evaluate the stability of a single elbow support position. Subjects were eighteen healthy adolescent individuals, and the center of pressure (COP) of their forearm weighted upper body were measured in this position. We also examined the reliability of COP measured, and the influence of when shoulder joint angle was changed. The measurements of COP were carried out in two conditions; where the subjects maintained the static position, and they moved their upper body to four directions (anterior, posterior, superior and inferior). As a result, reliability was indicated at the parameters of length of COP trajectory in static condition and anterior-posterior COP distance in dynamic condition. By the comparison among COPs in a single elbow support position with the shoulder abduction angles of supported side of 30, 45 and 60 degree, no significant difference was found in all parameters under both conditions. Further investigations are needed to clarify the cause of instability in a single elbow support position among the disabled.
