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Int J Sports Med 2024; 45(02): 116-124
DOI: 10.1055/a-2200-5937
Training & Testing

Inter-repetition Rest Impact on Percentage of Repetition Completed at Certain Velocity Loss

Carlos Martínez-Rubio
1   SPORT Research Group (CTS-1024), CIBIS, Research Center, University of Almería, Almería, Spain
,
Mauricio Elías Leandro Quidel-Catrilelbún
2   Institute of Sport, Faculty of Health and Social Science, Universidad de Las Americas, Santiago, Chile
,
Andrés Baena-Raya
1   SPORT Research Group (CTS-1024), CIBIS, Research Center, University of Almería, Almería, Spain
,
Manuel Antonio Rodríguez-Pérez
1   SPORT Research Group (CTS-1024), CIBIS, Research Center, University of Almería, Almería, Spain
,
Alejandro Pérez-Castilla
1   SPORT Research Group (CTS-1024), CIBIS, Research Center, University of Almería, Almería, Spain
› Institutsangaben Funding Andrés Baena-Raya is currently funded by the Ministry of Science, Innovation and Universities of the government of Spain under a predoctoral grant (grant number: FPU20/05746).
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Abstract

This study examined the impact of different inter-repetition rest (IRR) configurations (zero seconds [IRR0], three seconds [IRR3], and self-selected less than five seconds [SSIRR]) on estimating the number of repetitions (Nrep) and the percentage of completed repetitions relative to the maximum number of repetitions possible to failure (%rep) after reaching 10%, 20%, and 30% velocity loss thresholds (VLT). Eighteen men completed three sessions, each with a different IRR configuration, separated by 48–72 hours. Single sets of repetitions to momentary muscular failure were performed against 65%, 75%, and 85% of the one-repetition maximum during free-weight back squat and bench press exercises. No significant differences were reported between IRR configurations for the Nrep (P≥0.089) and %rep (P≥0.061), except for %rep after reaching the 20–30%VLT against 65%1RM and the 10–20%VLT against 75%1RM in the bench press exercise (P≤0.048). Additionally, both Nrep and %rep exhibited high interindividual variability (between-subject CV=14–79%) across the different IRR configurations. The individual %rep-%VLT relationships were slightly stronger than the general %rep-%VLT relationships (median R 2 =0.914–0.971 vs. 0.698–0.900). Overall, regardless of the IRR configuration, this novel velocity-based approach does not guarantee the same effort levels across subjects in the free-weight back squat and bench press sets.

Key word

exercise prescription - level of effort - strength training - velocity-based training


Publikationsverlauf

Eingereicht: 29. Juni 2023

Angenommen: 10. Oktober 2023

Artikel online veröffentlicht:
18. Dezember 2023

© 2023. Thieme. All rights reserved.

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