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Fifty-six five grade participants aged eleven to twelve (n\u2009=\u200932 boys, n\u2009=\u200924 girls) performed handgrip strength test on two different occasions, with a 5-day gap between them, as test\u2013retest. The Pearson correlation coefficient showed very large to almost perfect correlation between both devices (r\u2009=\u20090.76\u20130.91) which was graphically confirmed by Bland\u2013Altman method. Test\u2013retest also showed high reliability (ICC\u2009=\u20090.78\u20130.85) for Jamar and Takei. Trivial, nonsignificant differences (<jats:italic>p<\/jats:italic>\u2009&gt;\u20090.05) were observed between for test\u2013retest trials for Takei left hand (ES\u2009=\u20090.04), right hand (ES\u2009=\u20090.12) and Jamar left hand (ES\u2009=\u20090.15). 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