Abstract
The aim of this study was to determine inter-instrument reliability between Takei and Jamar dynamometers in school children. Fifty-six five grade participants aged eleven to twelve (n = 32 boys, n = 24 girls) performed handgrip strength test on two different occasions, with a 5-day gap between them, as test–retest. The Pearson correlation coefficient showed very large to almost perfect correlation between both devices (r = 0.76–0.91) which was graphically confirmed by Bland–Altman method. Test–retest also showed high reliability (ICC = 0.78–0.85) for Jamar and Takei. Trivial, nonsignificant differences (p > 0.05) were observed between for test–retest trials for Takei left hand (ES = 0.04), right hand (ES = 0.12) and Jamar left hand (ES = 0.15). According to the results, both the Jamar and Takei dynamometers are valid and reliable for measuring schoolchildren, and both devices may be used to assess a student's handgrip strength for this age group.
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