Effect of Using a Yorisoi Robot^® on Maximum Displacement of the Center of Gravity and Index of Postural Stability and Subjective Stability

Abstract

[Purpose] To investigate the effects of using a Yorisoi Robot^® on maximum displacement of the center of gravity and subjective stability. [Participants and Methods] The subjects were 15 in- and out-patients. The maximum displacement of the center of gravity, index of postural stability (IPS), and lower limb loading rate were measured. Subjective stability was measured using the subjective stability rating scale. Measurements were taken twice, when the device was not used and once when it was used. The maximum value of each was used in the comparison. [Results] The maximum displacement of the center of gravity (right and backward), IPS, and lower limb loading rate significantly improved when the device was used. The subjective stability was not significantly different. [Conclusion] This device was considered to be useful for imposing a balance load near to the stability limit range.