Quantification of Respiratory and Muscular Perceived Exertions as Perceived Measures of Internal Loads During Domestic and Overseas Training Camps in Elite Futsal Players

Abstract

BackgroundThe rating of perceived exertion (RPE) scales with respiratory and muscular illustrations are recognized as simple and practical methods to understand individual psychometric characteristics in breathing and muscle exertion during exercise. However, the implementation of respiratory and muscular RPE to quantify training load in futsal training camps has not been examined. This study investigates respiratory and muscular RPE relationships during domestic training camps (DTC) and overseas training camps (OTC) in an under 20 futsal national team.MethodsData collected from eleven field players were used for comparison in this study (age = 18.7 ± 0.7 years, height = 171.9 ± 6.1 cm, body weight = 64.2 ± 8.4 kg). All players reported Borg CR10 RPE (RPECR10) and 7-scales respiratory RPE (RPErespiration) and muscular RPE (RPEmuscle) (Dalhousie pictorial scales) after training sessions and matches. Additionally, total distance covered (TD) and training impulse (TRIMP) were used to quantify external and internal loads via the Polar Team Pro system. Paired-sample t-tests were used to compare the RPECR10, RPErespiration, RPEmuscle, TD, and TRIMP between DTC and OTC. Furthermore, linear regression was performed to determine the relationships among all RPE scales, TD, and TRIMP.ResultsThe RPECR10 (p = 0.047), TD (p < 0.001), and TRIMP (p < 0.001) showed significant difference between DTC and OTC. Furthermore, linear regression analyses showed significant correlation between RPErespiration and RPEmuscle (DTC: r = 0.857, p = 0.006; OTC: r = 0.924, p < 0.001), RPECR10 and RPErespiration (DTC: r = 0.857, p = 0.001; OTC: r = 0.863, p = 0.001), and RPECR10 and RPEmuscle (DTC: r = 0.906, p < 0.001; OTC: r = 0.900, p < 0.001).ConclusionPictorial RPErespiration or RPEmuscle can be used as an alternative to quantify perceived measures of internal loads during DTC and OTC in futsal players. Interpretation of perceived measures of training load and cardiac-related responses in association with external training loads during short-term training camps would be useful in further understanding the demands of futsal players’ experience in these circumstances.

Interpreting match performance in elite futsal: considerations for normalizing variables using effective time

“…A statistical package (Jamovi, version 1.8, 2021) was used for the calculation of the sample size. One sample T-Test was used to calculate the N. A minimally-interesting effect size (ES) (δ) 0.85, probability of error of 0.05, and minimum desired power 0.8, a sample size of 13 futsal players were required, similar to previous futsal studies ( 3 , 11 , 12 ). Thirteen different players in total (age: 27.4 ± 4.7 years, weight:70.3 ± 7.6 kg, height:176.3 ± 5.5 cm) participated in this investigation (10 same players participated in the FIFA Futsal World Cup 2021 and UEFA Futsal Euro 2022 and 3 new players called for the Futsal Finalíssima 2022 matches).…”

“…The sRPE was calculated by multiplying the RPE score by each player's total effective playing time. The use of RPE as a measure of internal load in futsal has been successfully implemented in previous studies ( 12 , 16 , 17 ).…”