Preprint Article Version 1 This version is not peer-reviewed

Is Perceived Exertion an Useful Indicator of Metabolic and Cardiovascular Response to Metabolic Conditioning of Functional-Fitness Session? A Randomized Controlled Trial

Version 1 : Received: 23 May 2019 / Approved: 24 May 2019 / Online: 24 May 2019 (11:36:10 CEST)

How to cite: Alsamir Tibana, R.; Manuel Frade de Sousa, N.; Prestes, J.; da Cunha Nascimento, D.; Ernesto, C.; Falk Neto, J.H..; Kennedy, M.; Azevedo Voltarelli, F. Is Perceived Exertion an Useful Indicator of Metabolic and Cardiovascular Response to Metabolic Conditioning of Functional-Fitness Session? A Randomized Controlled Trial. Preprints 2019, 2019050292 (doi: 10.20944/preprints201905.0292.v1). Alsamir Tibana, R.; Manuel Frade de Sousa, N.; Prestes, J.; da Cunha Nascimento, D.; Ernesto, C.; Falk Neto, J.H..; Kennedy, M.; Azevedo Voltarelli, F. Is Perceived Exertion an Useful Indicator of Metabolic and Cardiovascular Response to Metabolic Conditioning of Functional-Fitness Session? A Randomized Controlled Trial. Preprints 2019, 2019050292 (doi: 10.20944/preprints201905.0292.v1).

Abstract

The purpose of this study was to assess if self-regulation of intensity based on rating of perceived exertion (RPE) is a reliable method to control the intensity of metabolic conditioning of functional-fitness session. In addition, the relationship between RPE and changes in heart rate and lactate responses was also analyzed. Eight male participants (age 28.1 ± 5.4 years; body mass 77.2 ± 4.4kg; VO2max: 52.6 ± 4.6 mL·(kg·min)−1) completed three randomly sessions (5 to 7 days apart) under different conditions: (1) all-out (ALL); (2) self-regulation of intensity based on a RPE of 6 (hard) on the Borg CR-10 scale (RPE6); and (3) a control session. Rate of perceived exertion, LAC and HR response were measured pre, during and immediately after the sessions. The RPE and LAC during the ALL-OUT sessions were higher (p ≤ 0.05) than the RPE6 and control sessions for all the analyzed time points during the sessions. Regarding HR, the 22 min area under the curve of HR during ALL-OUT and RPE6 sessions were significantly higher (p ≤ 0.05) than the control session. The average number of repetitions was lower (p ≤ 0.05) for the RPE6 session (190.5 ± 12.5 repetitions) when compared to the ALL session (214.4 ± 18.6 repetitions). There was a significant correlation between RPE and LAC (p = 0.001; r = 0.76; very large) and number of repetitions during the session (p = 0.026; r = 0.55; large). No correlation was observed between RPE and HR (p = 0.147; r = 0.380). These results indicate that self-regulation of intensity of effort based on RPE may be a useful tool to control exercise intensity during a metabolic conditioning session of functional-fitness.

Subject Areas

CrossFit; high-intensity functional training; Extreme conditioning programs

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