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The average of three consecutive measurements is the most frequently used method for grip strength assessment. The purpose of this study was to compare the consistency of the maximum value with that of the average value of three consecutive measurements of grip strength. One hundred healthy volunteers participated in this study. Three measurements of grip strength were taken on two occasions separated by 2 weeks. For each hand, two average values and two maximum values were obtained. Ninety-five per cent limits of agreement for the average method were – 8.3 (−23%) to +7.2 (+20%) kg and for the maximum method were – 8.8 (−23%) to + 8 (+21%) kg. Both methods of grip strength assessment were found to be highly consistent with no statistically significant difference.