ABSTRACT
Match analysis is characterized by the study of training and competition, in order to quantify and qualify the effectiveness of their actions, in all their aspects (e.g., tactical-technical-physical). It is often used in team sports to obtain objective information about the performance of players and teams, and can help coaches to plan training sessions that are more representative of the real demands of the match. Several factors can interfere in the performance of a team or player, such as the "contextual variables". The aim of the present study was to investigate the effects of match location, competitive level and match status on the peak of physical demand in matches of the Catarinense Championship (edition 2021 ) and the Copa do Brasil (edition 2021). The match running performance data was monitored in 22 male professionals soccer players during two competitions: 1st Division of the 2021 Championship of Santa Catarina, 1st and 2nd Phase of the 2021 Cup of Brazil. The results found show that away matches presented higher peak of total distance covered compared to home matches (p < 0.05). Regarding the competitive level, no significant differences were observed (p > 0.05). In the analysis of the match status, it was found that when the analyzed team was winning the match, the peak total distance covered results were lower compared to when the team was losing. It is concluded that away matches and when the match status is losing presented greater peak physical demands than their counterparts.
El análisis del juego se caracteriza por el estudio del entrenamiento y la competición, con el fin de cuantificar y calificar la efectividad de sus acciones, en todos sus aspectos (ej., Táctico-técnico-físico). Se utiliza a menudo en deportes de equipo para obtener información objetiva sobre el rendimiento de jugadores y equipos, y puede ayudar a los entrenadores a planificar sesiones de entrenamiento más representativas de las demandas reales del juego. Varios factores pueden interferir en el desempeño de un equipo o jugador, como las llamadas "variables contextuales". El objetivo del presente estudio fue investigar los efectos del control del juego, el nivel competitivo y el resultado momentáneo en el pico de la demanda física en los juegos del Campeonato Catarinense y la Copa de Brasil 2021. Los datos de rendimiento de carrera en el juego fueron monitoreados en 22 jugadores profesionales del fútbol masculino durante dos competiciones: 1ª División del Campeonato de Santa Catarina 2021, 1ª y 2ª Fase de la Copa de Brasil 2021. Partidos en casa (p <0,05). En cuanto al nivel competitivo, no se observaron diferencias significativas (p> 0.05). En el análisis de los resultados momentáneos, se encontró que cuando el equipo analizado estaba ganando el partido, los resultados máximos de la distancia total recorrida eran menores en comparación con cuando el equipo estaba perdiendo. Se concluye que los partidos fuera de casa y cuando el resultado momentáneo es la derrota, promueven una mayor exigencia física en los jugadores. Por lo tanto, los entrenadores pueden usar esta información para prescribir sesiones de entrenamiento más efectivas que aborden las demandas reales del juego.
A análise de jogo é caracterizada pelo estudo do treino e da competição, de modo a quantificar e qualificar a efetividade das suas ações, em todos os seus aspectos (e.g., tático-técnico-físico). É usada frequentemente em esportes coletivos para obtenção de informações objetivas sobre o desempenho dos jogadores e equipes, podendo auxiliar os treinadores no planejamento de sessões de treinamento mais representativas das demandas reais do jogo. Diversos fatores podem interferir no desempenho de uma equipe ou jogador, tais como as denominadas "variáveis contextuais". O objetivo do presente estudo foi investigar os efeitos do mando de jogo, nível competitivo e resultado momentâneo sobre o pico de demanda física em jogos do Campeonato Catarinense e Copa do Brasil de 2021. Os dados de desempenho da corrida em jogo foram monitorados em 22 jogadores profissionais de futebol da categoria masculina durante duas competições: 1ª Divisão do Campeonato Catarinense de 2021, 1ª e 2ª Fase da Copa do Brasil de 2021. Os resultados encontrados mostram que os jogos realizados fora de casa apresentaram maior pico de distância total percorrida em comparação aos jogos em casa (p < 0,05). Em relação ao nível competitivo, não foram observadas diferenças significantes (p > 0,05). Nas análises dos resultados momentâneos, verificou-se que quando a equipe analisada estava ganhando a partida, os resultados de pico de distância total percorrida foram menores em comparação à quando a equipe estava perdendo. Conclui-se que partidas fora de casa e quando o resultado momentâneo é a derrota, promovem maiores exigências físicas aos jogadores. Os treinadores, portanto, podem usar essas informações para prescrever sessões de treinamento mais eficazes que contemplem as exigências reais do jogo.
ABSTRACT
The aim of this study was to evaluate the correlation between tools commonly used in the detection of physiological changes, such as clinical complaints, a biochemical marker of muscle injury, and performance data during official matches, with infrared thermography, which has been commonly used in the possible tracking of musculoskeletal injuries in athletes. Twenty-two athletes from a professional soccer club (age 27.7 ± 3.93 years; BMI 24.35 ± 1.80 kg/cm2) were followed during the season of a national championship, totaling 19 matches with an interval of 7 days between matches. At each match, the athletes used a Global Positioning System (GPS) device to collect performance data. Forty-eight hours after each match, every athlete's perception of recovery, fatigue, and pain was documented. Blood was collected for creatine kinase (CK) analysis, and infrared thermography was applied. Only athletes who presented pain above 4 in either limb were included for thermographic analysis. Each thermographic image was divided into 14 regions of interest. For statistical analysis, we included only the images that showed differences ≥ 1° C. Data normality was verified by the Kolmogorov-Smirnov test with Dallal-Wilkinson-Lilliefors correction. We used the Pearson correlation coefficient to verify the correlation between infrared thermography and the biochemical marker, performance data, and clinical recovery scales. No correlation was observed between mean skin temperature and blood CK levels, pain level, perception of recovery, and fatigue perception (r <0.2, p>0.05). Thus, infrared thermography did not correlate with CK level, pain, fatigue perception, or recovery, nor with performance variables within the field.
Subject(s)
Athletic Performance/physiology , Monitoring, Physiologic/methods , Skin Temperature/physiology , Thermography/methods , Adult , Athletes/statistics & numerical data , Biomarkers/blood , Creatine Kinase/blood , Cross-Sectional Studies , Female , Geographic Information Systems , Humans , Lower Extremity , Male , Monitoring, Physiologic/instrumentation , Monitoring, Physiologic/statistics & numerical data , Remote Sensing Technology/instrumentation , Soccer/physiology , Thermography/statistics & numerical data , Young AdultABSTRACT
This study aimed to quantify the weekly training load distributions according to match location, opponent standard, and match outcome in professional soccer players. Rate-of-perceived-exertion-based training load (sRPE) and distance- and accelerometry-based measures were monitored daily during 52 training sessions and 11 matches performed by 23 players. Athletes who played ≥ 60 min during non-congested weeks were considered for data analysis. The training days close to away matches (e.g., one day before the match = MD-1) presented greater sRPE, distance-based volume measures, and mechanical work (player load) compared to the training days close to home matches (p = 0.001-0.002; effect size (ES) = medium-large). The most distant days of the home matches (e.g., five days before the match = MD-5) presented higher internal and external loads than before away matches (p = 0.002-0.003, ES = medium). Higher sRPE, distance-based volume measures, and mechanical work were found during the middle of the week (e.g., three days before the match, MD-3) before playing against bottom vs. medium-ranking teams (p = 0.001-0.01, ES = small-medium). These metrics were lower in MD-5 before matches against bottom vs. medium-ranking opponents (p = 0.001, ES = medium). Higher values of all external load measures were observed during the training session before winning matches (MD-1) compared to a draw or loss (p < 0.001-0.001, ES = medium-large). In conclusion, the training load distribution throughout the week varied considerably according to match-contextual factors.
Subject(s)
Physical Conditioning, Human , Soccer , Workload , Adult , Athletes , Brazil , Humans , Male , Schools , Soccer/physiology , Young AdultABSTRACT
The aim of this study was to verify the effects of 22 weeks of training on functional markers and match performance through the use of earned points in competition. Twenty male soccer players were submitted to the same group of tests in four moments of the periodization: before the preparatory stage (T0); after the preparatory stage (T1); after the competitive stage I (T2); after the competitive stage II (T3). The functional markers were measured using the vertical and horizontal jump, T-40; Shuttle Run Test and RAST. The match performance was obtained by earned points in competition. An increase were found for all the variables analyzed for functional markers when T0 was compared with T3. In relation to the match performance, the team obtained 83.33% success in competitive stages. It is possible to conclude that training plan was efficient to improve technical-tactical skills and physical fitness of the studied athletes
Subject(s)
Humans , Male , Adolescent , Soccer , Physical Fitness , Evaluation Studies as Topic , Motor SkillsABSTRACT
The aim of the study was to verify the hydration status and the kidney function in marathoners during the training season and after a marathon race. Nine male runners were investigated during 12 weeks of training. Urine was collected in four moments; in the beginning (C1) and during (C2) the training program, before (C3) and after (C4) the competition. Urine pH was measured using reagent tapes, urine density with a refractometer, protein excretion by Bradford assay and erythrocytes and leucocytes by microscopy. Changes were observed when C-4 was compared to the other collection times for all variables investigated. It is possible to conclude that physical exertion induced important changes in the hydration status and glomerular membrane selectivity to macromolecules, modifying the kidney function of the marathoners in C4.
O objetivo do estudo foi verificar o estado de hidratação e a função renal de maratonistas durante uma temporada preparatória e após a competição. Foram estudados nove maratonistas durante 12 semanas de treinamento. A urina foi coletada em quatro momentos: antes (C1) e durante (C2) o protocolo de treinamento, antes (C3) e após (C4) a competição. Foram mensurados o pH a partir de tiras de reagentes, a densidade por meio do refratômetro, a proteinúria pelo ensaio de Bradford, concentração de eritrócitos e de leucócitos por microscopia. Alterações foram encontradas quando comparado o C-4 com as coletas anteriores para todas as variáveis estudadas. Pode-se concluir que o exercício físico induziu a modificações importantes no estado de hidratação dos corredores e na função da membrana glomerular, modificando assim, a função renal dos maratonistas no momento pós prova.
El objetivo del estudio fue determinar el estado de hidratación y la función renal en los corredores de maratón durante una temporada de preparación y después de la competición. Se estudiaron nueve corredores durante 12 semanas de entrenamiento. La orina se recogió en cuatro momentos: antes y durante el protocolo de entrenamiento, antes y después de la competición. PH de tiras reactivas, de densidad a través del refractómetro, proteinuria por Bradford ensayo, concentración de eritrocitos y leucocitos fueron medidos por microscopía. No se encontraron cambios al comparar el C-4 con las colecciones anteriores para todas las variables. Se puede concluir que el ejercicio induce cambios significativos en el estado de hidratación de los corredores y la función de la membrana glomerular, modificando de este modo la función renal del tiempo de maratón después de la carrera.
