ABSTRACT:In this study we assessed the reliability and the validity of the Modified Step Test (MST), modified from the step test developed by Hill et al., as a dynamic balance performance test in healthy elderly persons. Fifty-one elderly persons participated in this study. The MST, knee extension strength, Timed Up and Go Test, and maximal gait speed were measured. The maximum time to complete five steps, one foot on, then off, a block at the front or side of subjects as quickly as possible were measured in the MST. The MST was repeated two consecutive times on one day. The intraday reliability of the MST in each direction was high. The MST had a significant correlation with the other indices. Scores on the MST in each direction had no significant difference. It is supposed that the MST is a reliable instrument for screening balance dysfunction in either the forward or side direction among the elderly.
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