The training load imposed and perceived by coaches and soccer players, respectively, was compared for three weeks of the basic preparatory period of a professional soccer team through session ratings of perceived exertion (S-RPE). Participants were 24 professional Brazilian soccer players (all males, age: 24.1 ± 3.4 years) and their coaches. Athletes responded to the scale of perceived exertion (scores from 0 to10) after the training, while the coaches completed the scale prior to the training session, based on prior planning. The t-test for independent samples was used to compare S-RPE responses, and the Pearson correlation test was used to examine possible correlations between the parameters analyzed. There were no statistical differences between perceptions of prescribed (coaches) and experienced (players) S-RPE, and moderate correlations were found between these parameters ( r = .60; p = .003). No statistically significant group differences were found in the perceived exertion during any of three types of training: physical, technical, or tactical. The results suggest that the S-RPE prescribed during the preseason period (by coaches) was not different from that perceived by professional soccer players.

The aim of this study was to investigate possible correlations between aerobic and anaerobic fitness (in field tests) with performance during a 90 min friendly match, through the following variables: total distance covered, maximal running speed, number of high-intensity actions and number of sprints. Eighteen professional soccer players from a Brazilian elite team (age 23 ± 3 years, body mass 77.5 ± 8.9 kg) participated in the study. The athletes performed a Yo-Yo Endurance Test (aerobic fitness) and a Running Anaerobic Sprint Test (six maximal 35 m efforts separated by 10 s of passive recovery, anaerobic fitness). Data were collected during friendly matches using a GPS with 5 Hz technology. To establish the correlation between the variables determined during the matches, the Pearson correlation coefficient was used (significance level of p ≤ 0.05). A high correlation was found between distance covered in the Yo-Yo endurance test and total distance covered (r = 0.72; p < 0.05), number of high-intensity actions (r = 0.78; p < 0.05) and number of sprints (r = 0.88; p < 0.01) in the soccer matches. The RAST variables did not relate to the standards set during the matches (p < 0.05). From the results of the present study, it may be concluded that there is no correlation between RAST and friendly match data variables. However, better results in the Yo-Yo endurance test correlate with total distance, number of high-intensity actions and sprints during matches.

PAES, M. R. Percepção da imagem corporal em árbitros de futebol. Arq. Cienc. Saúde UNIPAR, Umuarama, v. 22, n. 3, p. 187-191, set./dez. 2018. RESUMO: O objetivo deste trabalho foi analisar a percepção da imagem corporal e identificar fatores individuais associados a esta percepção em árbitros de futebol do Brasil. Participaram do estudo 94 árbitros profissionais pertencentes à Federação Catarinense de Futebol, sendo todos do sexo masculino. Para a identificação da percepção da imagem corporal os árbitros responderam o Body Shape Questionnaire. A massa corporal e a estatura autorrelatadas foram utilizadas para o cálculo do índice de massa corporal. Observou-se que 64,9% dos árbitros estão insatisfeitos com a imagem corporal, sendo que o índice de massa corporal médio foi de 24,4 kg/m 2 . Quanto ao tempo de treinamento, observou que os árbitros treinam em média 3 dias/semana, cerca de 60 minutos/treino. Conclui-se que a maior parte dos árbitros está insatisfeita com a imagem corporal, sendo que, aqueles que passam mais tempo em treinamento estão mais satisfeitos com a imagem corporal. PALAVRAS-CHAVE: Árbitro. Futebol. Imagem corporal BODY IMAGE PERCEPTION IN SOCCER REFEREESABSTRACT: The purpose of this study was to analyze the body image perception and identify individual factors associated with this perception in Brazilian soccer referees. The study included 94 male professional referees registered at the Santa Catarina Soccer Federation. For the identification of body image perception, referees answered the Body Shape Questionnaire. Self-reported data on body weight and height were used to calculate body mass index. It was observed that 64.9% of referees were unsatisfied with their body image, and the mean body mass index was 24.4 kg/m². Regarding time spent in training, it could be observed that the referees train on average 3 days/week, for approximately 60 minutes/workout session. It can be concluded that most referees were unsatisfied with their body image, while those who spent more time in training are more satisfied with their body image.

The aim of this study was to measure the energy expenditure for locomotor activities usually performed by soccer referees during a match (walking, jogging, and running) under laboratory conditions, and to compare forward with backward movements. The sample was composed by 10 male soccer referees, age 29±7.8 years, body mass 77.5±6.2 kg, stature 1.78±0.07 m and professional experience of 7.33±4.92 years. Referees were evaluated on two separate occasions. On the first day, maximal oxygen uptake (VO2max) was determined by a maximal treadmill test, and on the second day, the oxygen consumption was determined in different speeds of forward and backward movements. The mean VO2max was 41.20±3.60 mL·kg-1·min-1 and the mean heart rate achieved in the last stage of the test was 190.5±7.9 bpm. When results of forward and backward movements were compared at 1.62 m/s (walking speed), we found significant differences in VO2, in metabolic equivalents, and in kcal. However, the same parameters in forward and backward movements at jogging velocities (2.46 m/s) were not significantly different, showing that these motor activities have similar intensity. Backward movements at velocities equivalent to walking and jogging are moderate-intensity activities, with energy expenditure less than 9 kcal. Energy expenditure was overestimated by at least 35% when calculated by mathematical equations. In summary, we observed that backward movements are not high-intensity activities as has been commonly reported, and when calculated using equations available in the literature, energy expenditure was overestimated compared to the values obtained by indirect calorimetry.