Vol 12, Issue 4

Effects of Different between Test Rest Intervals in Reproducibility of the 10-Repetition Maximum Load Test: A Pilot Study with Recreationally Resistance Trained Men

May 15, 2019 - By 

Authors

Estêvão Rios Monteiro, Federal University of Rio de Janeiro
Jakob Vingren, University of North Texas
Victor Gonçalves Corrêa Neto, Federal University of Rio de Janeiro
Eduardo Borba Neves, Brazilian Army Research Institute of Physical Fitness
James Steele, Southampton Solent University
Jefferson S. Novaes, Federal University of Rio de Janeiro, Brazil
International Journal of Exercise Science 12(4): 932-940, 2019. 
DOI: 10.70252/RYPO6126

Abstract

The purpose of this study was to compare the effect of 24-, 36-, 48-, 72- and 96-hours between-test rest intervals on the reproducibility of the 10-RM smith machine back squat (BS), bench press (BP) and leg press at 45 degrees (LP45) exercises. Twelve resistance trained men (26.6 ± 4.5 yrs; 179.0 ± 5.5 cm; 92.2 ± 24.6 kg) performed five sets of identical 10-repetition maximum (10-RM) tests for the BS, BP, LP45 exercises, each set with a different interval between tests: 1) twenty-four hours (Post-24), 2) thirty-six hours (Post-36), 3) forty-eight hours (Post-48), 4) seventy-two (Post-72), and 5) ninety-six hours (Post-96). Significant differences in 10-RM from pretest to posttest were observed for BS in Post-24 (p < 0.001; ∆% = -12.62), Post-36 (p < 0.001; ∆% = -6.57), and Post-96 (p = 0.015; ∆% = 6.84). Similarly, significant differences in 10-RM from pretest to posttest were observed for BP in Post-24 (p < 0.001; ∆% = -9.22), Post-36 (p = 0.032; ∆% = -3.04), and Post-96 (p < 0.001; ∆% = 5.37). Finally, significant differences in 10-RM from pretest to posttest were observed for LP45 in Post-24 (p < 0.001; ∆% = -16.55), Post-36 (p = 0.032; ∆% = -5.09), and Post-96 (p < 0.001; ∆% = 5.54). The reproducibility of 10-RM was examined using intraclass correlation coefficients; BS: 0.944, 0.977, 0.988, 0.986, and 0.954 for Post-24, Post-36, Post-48, Post-72, and Post-96, respectively; BP: 0.894, 0.966, 0.966, 0.960, and 0.976; and LP45: 0.832, 0.957, 0.984, 0.974, and 0.977 5. Based on the findings, the optimal between test rest interval duration for 10-RM testing, to provide the best reproducibility, in resistance trained men appears to be 48 to 72 hours for the BS, BP, and LP45 exercises.

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