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Centre of pressure (COP) measurements have been Jrequently used in the evalwrion of postural control, especially in the elderly. Despite this, the retest r e l i a b i e of these measures has not been weU investigated in this age group. This study investigated the retest reliability of COP measures using a force platform in I7 women with a mean age of 69.5 years. (ICCs) ranging between 0.27 and 0.55. I n contrast, ICCs were high (between 0.81 and 0.92) for test conditions involving a n g u h perturbation of the support ($9.05). The study ako revealed no series effects using twelve consecutive 25 second tests on the force platform. These results support further investigation of dynamic standing balunce in older women using the test protocol described in this study, including whether these tests are able to discriminate between fallers and non fallers, and their predictive validity. Aileen KalogempoJos is a msearch nurse a1 NARI. Jennifer Schwa-is a senior lecturer in geriafric medicine 01 NARI. Results indicated low correlations between test occasions for static stance postures with Intraclass Correlcltion Coefficients surface. Investigation of test durations of 10 and 25 second length did not indicate any significant difference between these two test durations

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