Total Repetitions Per Set Effects Repetitions in Reserve-based Rating of Perceived Exertion Accuracy

Le résumé fourni par la source

The resistance training-specific rating of perceived exertion (RPE) scale measuring repetitions in reserve (RIR) has been validated to gauge effort per set in resistance exercise. However, it is unknown what descriptive factors of the lifter influence RPE/RIR accuracy. PURPOSE: The purpose of this study was to examine the relationship between total repetitions per set and the accuracy of intra-set RPEs of 5, 7, and 9 on the 1-10 RIR-based RPE scale. METHODS: Twenty-five college-aged and resistance trained men (Age: 25±3yrs, Body Mass: 88.95±14.72kg) performed a one-repetition maximum (1RM) back squat followed by one set of maximum repetitions at 70% of 1RM. Subjects were blinded to the load during the 70% set via an opaque trash bag covering the weight discs. During the 70% set subjects verbally called a 5RPE (i.e. 5RIR), 7RPE (i.e. 3RIR), and 9RPE (i.e. 1RIR) when the subject believed he was at the respective threshold. Pearson product moment correlations were used to assess relationships between total repetitions performed and the absolute RIR difference from the actual RIR when each RPE was verbally called. For example, if a subject completed 15 total repetitions and called a 5RPE after 7 repetitions then the RIR difference would equal 3. RESULTS: Average squat 1RM was 175.76±34.68kg and the mean number of repetitions performed at 70% of 1RM was 16±4. There were moderate and significant correlations between total repetitions performed and the RIR difference at the called 5RPE (r=0.64, p=0.01) and 7RPE (r=0.56, p=0.004), however no relationship between total repetitions and the RIR difference existed at the called 9RPE (r=0.01, p=0.97). CONCLUSION: Our findings suggest that the greater amount of repetitions performed per set is related to increased difficulty to accurately gauge RIR further from failure. However, total repetitions per set do not seem to effect RIR accuracy when close to failure (i.e. 9RPE).

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.