Validação das escalas ordinais pareadas de classificação subjetiva da intensidade de treino e do estado físico para controle do treinamento em jogadores profissionais de futebol

Abstract

The aim of the present study was to develop and validate paired ordinal scales of subjective perception of physical state (PS) and training intensity (TI) in professional soccer athletes. Twenty two (27.01 ± 4.38 years) professional athletes from first division soccer club participated in this study for reliability of the scales. Further, 15 from these 22 continued for the validation process. For sample characterization Yoyo Endurance Test and lactate threshold (OBLA) test were made. After familiarization with the scales five training sessions (small sided games 64m x 68m) were monitored for reliability. They were all similar (duration 60 minutes) and composed by five games of 10 minutes duration with 3 minutes of passive recovery between them. For validation process, nine training sessions were monitored (defense vs offense, small sided games, tactical and technical training and simulated games). Hydration for both reliability and validity were ad libitum. All the training sessions were performed at 16:00 between January and February. Heart rate monitors (HR) and global positioning system were given to the athletes in the beginning of all training sessions. Thirty minutes after the end of it, they were collected by the researches along with the subjective perception of effort (RPE) derived from the TI. On the next morning (09:00), the perception of physical state from the PS scale was also collected. Reliability was calculated by the intraclass correlation coefficient (ICC3.1) and standard error of measurement (SEM). To verify the normality of the data, Shapiro-Wilk test were performed. For validity Spearman correlation and multiple linear regression (stepwise) were made among the variables TI, PS, mean HR, %HRmax, %HROBLA, Banister et al. (1991) training impulse (TRIMPB), Stagno et al. (2007) training impulse (TRIMPMOD), session RPE, kcal, minutes, total distance covered and mean speed. For association of the scores from the TI and PS the chi square were made and also an exploratory factorial analysis. The paired ordinal scales TI e PS were reliable (ICC3.1 of 0.74 and 0.77 and SEM of 0.30 and 0.30, respectively) and valid, being the TI explained by the TRIMPB (adjusted R2 = 0.57; F2.133 = 174.80, p < 0.001) and the PS by the TRIMPMOD (adjusted R2 = 0.58; F2.133 = 184.97, p< 0.001). In summary, the paired ordinal scales TI and PS are reliable and valid for monitoring training sessions of Brazilian professional soccer players.