Abstract
[Purpose] To clarify the influence of isometric knee extension strength (IKES) on the one-leg standing (OLS) time. [Subjects and Methods] The subjects were 323 elderly inpatients. They were divided into groups, on the basis of IKES, from 0.2 to 0.6 kgf/kg at 0.1 kgf/kg intervals, and their OLS times were compared. [Results] The results showed that when both the left and right leg IKES was low, OLS times were short. When subjects were dichotomized on the basis of 0.4 kgf/kg IKES for both the right and left legs, a significant difference was found in the OLS times of the two groups. However, no significant difference in OLS times was found between the group of subjects with IKES > 0.5 kgf/kg, and any of the other groups. [Conclusion] There is a close relationship between IKES and OLS time, and it seems that, when IKES drops below 0.4 kgf/kg, the effect on OLS time is large.
