Modeling the Repetitions-in-Reserve-Velocity Relationship: A Valid Method for Resistance Training Monitoring and Prescription, and Fatigue Management.

Jukic, Ivan
Prnjak, Katarina
Helms, Eric R
McGuigan, Michael R
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Wiley Periodicals LLC

Establishing a relationship between repetitions left in reserve and the mean absolute velocity (RIR-velocity relationship) during resistance training (RT) could allow for objective monitoring, prescription, and real-time adjustment of the training load and set-volume. Therefore, we examined the goodness of fit and prediction accuracy of general and individual RIR-velocity relationships in the free-weight back squat exercise. The effects of sex, training status and history, as well as personality traits, on the goodness of fit and the accuracy of these relationships were also investigated. Forty-six resistance-trained people (15 females and 31 males) performed a one-repetition maximum (1RM) test, and two repetitions to failure (RTF) tests 72 h apart. We found greater goodness of fit of individual RIR-velocity relationships compared to general RIR-velocity relationships. Individual, but not general RIR-velocity relationships established in the first testing session yielded acceptable prediction accuracy of RIR (mean error <2 repetitions) in the subsequent testing session, regardless of the load used. Similar results were obtained when both general and individual RIR-velocity relationships were averaged across the loads, suggesting that a single RIR-velocity relationship covering a range of loads can be used instead of traditional RT methods, potentially allowing for better fatigue management and more efficient adaptation.

exercise monitoring , exercise prescription , fatigue , rating of perceived exertion , strength training , velocity-based training , 0606 Physiology , 1103 Clinical Sciences , 1116 Medical Physiology , 3208 Medical physiology
Physiol Rep, ISSN: 2051-817X (Online), 12(5), e15955-. doi: 10.14814/phy2.15955
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© 2024 The Authors. Physiological Reports published by Wiley Periodicals LLC on behalf of The Physiological Society and the American Physiological Society. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.