Despite a favorable improvement in physical function, the incidence of falls was not significantly reduced by WBV exercise plus squat training compared with WBV exercise alone (0% in the squat training group versus 14.3% in the exercise group). Thus, the magnitude of the clinical effect of squat training in addition to WBV exercise remains uncertain. However, one possibility for the lack of a significant effect of WBV exercise plus squat training on the incidence of falls may be inadequate statistical power. The duration of the presently reported study was 6 months and the sample size was 28 (n=14 in each group). Further, the standard deviations of some physical function parameters were relatively