外的負荷が肘関節角度調節能力に与える影響

抄録

　The purpose of this study was to compare the ability to control elbow joint angle under conditions with and without imposed external load, and to obtain fundamental data on this issue. Fourteen male college students (21.4 ± 0.7 yr) participated in the experiment. The participants attempted to flex their elbow to a target angle with their eyes closed, with and without an external load. For the external load condition, 6 levels of external load starting at 10%1RM with 10% increments up to 60%1RM were applied. The target angles were 15º, 30º, 45º, 60º, and 90º. We calculated the difference between the target angle and the actual joint angle. It was found that, regardless of the external load, participants were able to control and grade their elbow joint angle to the various targets. For the 15º target, the absolute error was greater than for the 30º target. %iEMG of the biceps and triceps became smaller as the target angle increased, and %iEMG increased along with the external load. These findings suggest that an external load can not influence the ability to control the elbow joint angle.