Browsing by Author "Caldeira, Romualdo"
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- Caracterização das lesões numa equipa do futebol profissional portuguêsPublication . Martins, Francisco; Santos, Francisco; Caldeira, Romualdo; Henriques, Ricardo; França, Cíntia; Ornelas, Rui; Gouveia, Élvio RúbioO futebol profissional caracteriza-se pelas suas exigências físicas, fazendo com que a exposição dos jogadores a riscos elevados de lesão seja uma problemática em ascensão. O objetivo deste estudo é caracterizar as lesões de uma equipa profissional de futebol ao longo de uma época. Trinta e seis atletas do sexo masculino, enquadrados na 1.ª Liga Portuguesa de Futebol, foram acompanhados ao longo da época desportiva 2020/2021. Caracterizou-se uma lesão desportiva como a incapacidade demonstrada pelo atleta, devido a um momento de treino ou jogo, que exigiu intervenção médica ou interrupção parcial ou total da sua atividade desportiva. No total, 34 lesões foram registadas. Cada jogador falhou em média 14.3 dias devido a lesão. As lesões mais recorrentes foram as entorses (35.3%) e as lesões musculares (35.3%), sendo os membros inferiores a zona do corpo mais afetada (85.29%). As lesões ocorreram maioritariamente em treino (58.8%) e as de jogo registaram-se sobretudo nos últimos 15 minutos (57.14%). Os resultados obtidos neste estudo vêm auxiliar o staff técnico das equipas profissionais de futebol na identificação de fatores de risco associados às lesões no futebol profissional. O estudo desta temática é fundamental para a otimização dos protocolos de prevenção e de recuperação de lesões.
- O ensino da educação física: contributos da investigação sobre os modelos de ensino centrados no alunoPublication . Gouveia, Elvio Rúbio; Lopes, Helder; Rodrigues, Ana; Gouveia, Bruna; Caldeira, Romualdo; Freitas, Rúben; Alves, Ricardo; Correia, Ana; Antunes, Hélio; Marques, Adilson; Kliegel, Matthias; Ihle, AndreasA literacia científica em Educação Física tem proporcionado um aumento signi ficativo do conhecimento sobre as estratégias de ensino-aprendizagem mais apro priadas ao desenvolvimento de competências do aluno, em particular no contexto dos jogos desportivos coletivos. Um exemplo da importância da Educação na pro moção da literacia científica no contexto dos jogos desportivos coletivos é o projeto de investigação “Educação Física nas Escolas da RAM – Compreender, Intervir, Transformar”. Esta investigação tem discutido o efeito da utilização de modelos de ensino centrados no aluno, influenciados por ideias construtivistas e cognitivistas. A utilização destas novas abordagens no ensino dos jogos desportivos coletivos é a resposta da Escola à forma como deve preparar os seus alunos para se envolverem de forma positiva em atividades desportivas ao longo da vida.
- Speed and agility predictors among adolescent male football playersPublication . França, Cíntia; Gouveia, Élvio; Caldeira, Romualdo; Marques, Adilson; Martins, João; Lopes, Helder; Henriques, Ricardo; Ihle, AndreasThis study aimed to examine the associations between lower-body explosive strength (squat jump—SJ, and countermovement jump—CMJ), speed (10- and 35-m linear sprints), and agility (t-test) capacities, after controlling for crucial predictors such as chronological age (CA) and body composition. The sample was composed of 164 adolescent male football players from under 19, under 17, and under 15 age groups. Body fat percentage (BF%) was significantly and positively related to body mass, speed, and agility. In contrast, BF% was a significant negative predictor of lower-body explosive strength. Sprint and t-test times were significantly and negatively correlated with lower-body explosive strength. After controlling for CA and body composition, SJ was the most significant predictor, accounting for 36 to 37% of the variance observed in the 35 m linear sprint and the t-test performance. Our main results suggest that lower-body explosive strength, particularly in the SJ, is a significant predictor of male adolescent male football players’ speed and agility capacities. Conversely, detrimental relationships between BF% and these outcomes were observed. Sports agents should consider lower-body explosive strength development as part of the youth football training process, particularly to improve maximal sprint and change of direction times, which are crucial to game performance.
- The influence of numerical variability in small-sided games on youth football goalkeepers’ tactical-technical behaviourPublication . Sousa, Honorato; Gouveia, Élvio; Sarmento, Hugo; Caldeira, Romualdo; Marques, Adilson; Lopes, Helder; Ihle, AndreasPurpose. The main purpose of this study was to investigate changes in the tactical-technical behaviour of football goal keepers (GKs) across 5 small-sided games (SSGs) formats with temporary numerical variability. Methods. The sample involved 4 male under-17 GKs from the same team aged 16.1 ± 0.52 years. Three sessions were held on 3 different days to collect information. On each day, the 10-minute SSGs exercise with temporary numerical vari ability was repeated twice. The numerical ratio of players changed every 2 minutes without interrupting the practice. The exercise always started with a situation of 3 vs. 3 + GK (‘+ GK’ for both teams in each format), going through 4 vs. 3 + GK, 5 vs. 3 + GK, 3 vs. 4 + GK, and 3 vs. 5 + GK. Results. The 3 vs. 3 + GK format and the numeric superiority by 1 and 2 (4 vs. 3 + GK and 5 vs. 3 + GK) induced fewer defensive tasks in comparison with numeric inferiority (3 vs. 4 + GK and 3 vs. 5 + GK). From an offensive perspective, 3 vs. 3 + GK caused more offensive tasks in comparison with numeric superiority by 1 and 2 (4 vs. 3 + GK and 5 vs. 3 + GK). However, the game formats in numeric inferiority (3 vs. 4 + GK and 3 vs. 5 + GK) induced more offensive tasks. Conclusions. This study suggests the use of temporary numerical variability SSGs to increase offensive and defensive GK tactical-technical behaviour.
- The Relationship between Different Large-Sided Games and Official Matches on Professional Football Players’ Locomotor IntensityPublication . Caldeira, Romualdo; Gouveia, Élvio Rúbio; Ihle, Andreas; Marques, Adilson; Clemente, Filipe Manuel; Lopes, Helder; Henriques, Ricardo; Sarmento, HugoLarge-sided games (LSG) are commonly used in the training contexts for providing ei ther technical/tactical or locomotor/physiological stimuli. Despite natural similarities with the official match, the locomotor profile seems to be different, which must be considered by the coaches to identify compensatory strategies for achieving the ideal dose of training. The aim of this study was two-fold: (1) to investigate the locomotor demands imposed by LSGs and the official matches; and (2) to compare the effect of different pitch sizes’ LSG conditions in the locomotor demands. This study followed an observational design. Sixteen professional football players from the same team (26.3 ± 3.0 years old) were included. The study was conducted over four weeks. The same GK + 10 × 10 + GK play format with different pitch sizes (i.e., area per player ranging between 195 m2 to 291 m2 ) was analyzed. Three official matches were also collected in which the 10 most de manding minutes were considered for further comparisons. Only the same players who participated in matches were considered in comparison with the LSG. The data were obtained using a 10-Hz global positioning system technology. Total distance (TD) and mechanical work (MW) scores increased 20% and 23%, respectively, between the smallest and biggest pitch sizes (p < 0.001). There was a significant difference in locomotor intensity metrics between opponents from different positions on the table (p = 0.001). The biggest LSG (i.e., 291 m2 per player) was the only one that required similar levels of locomotor intensity as required in the official full match. The present study demonstrates that LSG pitch size variation requires different locomotor intensities. Bigger pitch sizes cause an increase in TD and MW. In addition, considering the position on the table, the level of opponents induces different TD covered. Finally, the largest LSG simulates the official match more accurately.