Reliability of the 8-repetition maximum test in men and women.
J Sci Med Sport, 2012/1;15(1):69-73.
Taylor JD[1], Fletcher JP
Affiliations
PMID: 21820961DOI: 10.1016/j.jsams.2011.07.002
Impact factor: 4.597
Abstract
objective: The 8-repetition maximum test has been recommended as a method of prescribing an intensity for resistance training in healthy adults, athletes, and patients with health conditions. Yet, limited research related to the reliability of 8-repetition maximum testing has been conducted. The purpose of this study was to determine the reliability of the 8-repetition maximum test in men and women.
design: Test-retest reliability study.
methods: Twenty-eight people (14 males, 14 females, mean age=23.0 years [standard deviation=1.3]) with no exercise contraindications participated in this study. After familiarization, each participant underwent 8-repetition maximum testing using 4 different exercises. For all participants, the 8-repetition maximum test was performed during 2 sessions with 2-3 days between sessions. The intraclass correlation coefficient (ICC([1,2])), typical error as the coefficient of variation (TE(CV)), and the Bland-Altman plot were used to assess reliability. Unpaired t-test was used to determine the influence of gender on differences between initial test and retest values.
results: Excellent reliability of the 8-repetition maximum test was found for all exercises (ICC([1,2])>0.9). The range of TE(CV) values was 3.4-10.4%. The Bland-Altman plot illustrated that 27 out of 28 data points for total 8-repetition maximum scores were within the 95% limits of agreement. Unpaired t-test indicated no significant difference between men and women in variations between initial test and retest 8-repetition maximum scores.
conclusion: The findings of this study suggest that an 8-repetition maximum test protocol that includes familiarization is reliable in men and women.
MeSH terms
Arkansas; Athletic Performance; Exercise Test; Female; Humans; Male; Reproducibility of Results; Weight Lifting; Young Adult
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