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Based on the results of this review, it can be concluded that the 1RM test generally has good to excellent test-retest reliability, regardless of resistance training experience, number of familiarization sessions, exercise selection, part of the body assessed (upper vs. lower body), and sex or age of participants. Researchers and practitioners, therefore, can use the 1RM test as a reliable test of muscular strength.
Grgić et al. (Fri,) studied this question.
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