Percorrer por autor "Travassos, Bruno"
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- Body composition and grip strength constraints in elite male rink-hockey players of contrasting ethnicityPublication . Ferraz, António; Santos, João Valente dos; Duarte-Mendes, Pedro; Nunes, Célia; Victorino, Samuel; Silva, Manuel Coelho e; Travassos, BrunoRink hockey is a highly specialized and physiological demanding sport with sparse research regarding the game and athletes’ characteristics. A cross-sectional study was developed to characterize the body composition and grip strength of elite male rink hockey players and to establish the relationship between ethnicity on body composition and grip strength. A sample of 100 elite rink-hockey athletes aged 26.59 ± 6.02 participated in the study, comprised of 69 Caucasian male adults aged 27.58 ± 6.44 years and 31 Black African male adults aged 24.39 ± 4.27. Body composition was assessed by anthropometric measurements. Static grip strength was assessed with an adjustable dynamometer. Multiple regression analysis was applied to understand which variables constraints body fat percentage (BF) and grip strength. Body mass showed an average of 76.36 ± 9.18 kg for 175.80 ± 5.87 cm of height and BF% of 10.82 ± 5.07%. Maximal right grip strength was 50.91 ± 6.26 kg and 50.27 ± 6.23 kg for left grip strength. Four predictors accounted for 70.01% of the variance of BF%: abdominal circumference (p < 0.001), right thigh circumference (p < 0.001), right calf circumference (p = 0.001) and ethnicity (p = 0.016). Three predictors accounted for 13.1% of the variance of right grip strength: ethnicity (p = 0.013), chronological age (p = 0.024) and right distal thigh circumference (p = 0.014). Results suggest that elite rink hockey athletes have a specific anthropometric identity, which at the elite level may lead to reduced body fat and greater handgrip strength. Ethnicity seems to predict body fat and grip strength in elite rink hockey athletes.
- Bridging the gap between training and competition in elite rink hockey : a pilot studyPublication . Ferraz, António; Pérez-Chao, Enrique Alonso; Ribeiro, João; Spyrou, Konstantinos; Freitas, Tomás T; Santos, João Valentes dos; Alcaraz, Pedro E; Travassos, Bruno; Duarte-Mendes, PedroBackground: Monitoring training load and competition load is crucial for evaluating and improving athlete performance. This study proposes an applied approach to characterize and classify the training task specificity in relation to competition in a top-level rink hockey team, considering external and internal load from training tasks and competition. Hypothesis: Training tasks and game demands have significant dose-response differences, and exercises can be classified successfully based on their physiological and biomechanical demands. Study Design: Cross-sectional study. Level of Evidence: Level 5. Methods: Ten elite-level male rink hockey players participated in this study. Players were monitored on 6 different task categories during 8 training sessions and 2 official games. A linear mixed model with random intercepts was used to compare training tasks and competition load, accounting for individual repeated measures. A 2-step cluster analysis was performed to classify the training tasks and games based on physiological and biomechanical load, employing log-likelihood as the distance measure and Schwartz’s Bayesian criterion. Results: Average heartrate , maximum heartrate, and high-speed skating (18.1-30 km/h) were the best physiological load predictors, while the most effective biomechanical load predictors were impacts [8-10] g(n), decelerations [-10 to -3]m/s²(n), and accelerations [3-10]m/s²(n). Different physiological and biomechanical responses were verified between training tasks and match demands. A 4-quadrant efforts assessment for each task category revealed that training tasks used by the team in the analysis presented lower biomechanical and physiological load demands than competition. Conclusion: Training tasks failed to adequately replicate the specific demands of competition, especially regarding high mechanical stress, such as the absence of high-intensity impacts and decelerations. Clinical Relevance: This method of classification of training tasks may allow coaches to understand further the specificity and contribution of each task to competition demands, consequently improving the capacity of load management and the preparedness and readiness of players for competition.
- Dynamics of training and competition demands in top-class male rink hockey : a case study of a rink hockey European ChampionshipPublication . Ferraz, António; Duarte-Mendes, Pedro; Ribeiro, João Nuno; Yousefian, Farzad; Santos, João Valente dos; Travassos, BrunoThis study aimed to investigate the training load through external and internal load dynamics across the preparation and competition of a top-level national team during a Rink Hockey European Championship. A non-experimental descriptive method was developed. A two-way mixed design ANOVA and a Spearman correlation test were used to compare and understand the relationship between players’ external and internal load across microcycles during training sessions and competitive matches. Results revealed significantly higher values between training match day −3 to training match day −1 for player load (p ≤ 0.05), distance covered, and high-speed skating (p ≤ 0.001). Competition weeks exposed significantly higher values in comparison with training weeks. Interestingly, during competition, high impacts (p ≤ 0.001, r = 0.64) and decelerations (p ≤ 0.001, r = 0.43) had a greater influence on players’ session RPE than in training weeks. Different external and internal load dynamics were observed in the competition and training weeks, with high impacts and decelerations appearing to create a physiological impact on players, but the same does not occur in the training sessions. Results highlight the need to understand the competitive dynamics of each sport and the use of the most appropriate metrics to monitor the preparation process.
- Effects of an imagery programme on the performance of federated and non-federated Boccia athletesPublication . Amorim, André; Travassos, Bruno; Monteiro, Diogo; Baptista, Liliana; Duarte-Mendes, PedroThe aim of this study was to analyse the effects and the relations through the implementation of an imagery (IM) training programme for federated and non-federated Boccia participants. Twenty-one Boccia athletes participated in this study. At the beginning of the study, and after a period of an 8-week IM training, the athletes’ IM ability (MIQ – 3) and their performance in Boccia tasks (distance to target and distance to coloured ball) were assessed. Data analysis was carried out using non-clinical magnitude-based inferences. The results suggests that, from pre to post test, federated and non federated athletes had a higher IM score and exhibited an improved performance. The performance levels seem to have been influenced by the participants’ level of expertise, with the non-federated athletes revealing higher magnitude of improvement than federated athlete’s. A non-significant correlation was observed between IM and performance. Although the inconsistency of the relationship between IM and performance, the results suggests that IM training enhances the development of IM ability and also motor actions in Boccia athletes.
- Eficácia do treino de visualização mental em praticantes de Boccia federados e não federadosPublication . Amorim, André; Duarte-Mendes, Pedro; Travassos, BrunoEste estudo teve como objetivo investigar a eficácia de um treino de visualização mental (VM) em praticantes de Boccia. Participaram neste estudo um total de 42 praticantes, federados (n = 24) e não federados (n = 18). Doisgrupos de praticantes de Boccia federados e não federados foram divididos em d ois sub-grupos: experimental, submetido ao treino de VM (Federados: n = 12; Não federados: n = 9) e de controlo, submetido a treino regular (Federados: n = 12; Não federados: n = 9). No início do estudo e após um período de 8 semanas de treino de VM, os participantes completaram o Movement Imagery Questionnaire – 3 (MIQ – 3), versão portuguesa. A análise de dados foi realizada com recurso ao método de inferências baseadas na magnitude dos efeitos. Os dois grupos mostraram-se homogéneos no que diz respeito à habilidade de VM no primeiro momento de avaliação, verificando-se um efeito do treino de VM no segundo momento de avaliação. Os resultados revelaram que o grupo experimental (federados e não federados) aumentou a habilidade de VM, enquanto o grupo de controlo (federados e não federados) não revelou alterações na habilidade de VM. Por sua vez, os praticantes não federados do grupo experimental revelaram um aumento superior na habilidade de VM em comparação com os praticantes federados. Os resultados obtidos sugerem a importância da realização de programas de treino de VM para a melhoria das capacidades de VM dos praticantes da modalidade desportiva de Boccia federados e não federados.
- Imagery ability in Boccia: Comparison among federate athletes from different medical sport groupsPublication . Amorim, André; Travassos, Bruno; Duarte-Mendes, PedroThe aim of this study was to analyse and compare movement visualization ability in federate and non-federate Boccia athletes, and among federate Boccia medical sport groups. Forty-two Boccia athletes (Federate N = 24; Non-federate N = 18) at an average age of 35.8 (SD = 11.19) participated in this study. The Portuguese version of Movement Imagery Questionnaire - 3 (MIQ-3), was used for this study. The participants were evaluated on the internal and external visual imagery. Statistics was carried out following the method of interference based on the magnitude of the effects. Results showed a great effect of expertise in imagery ability. The comparison between federate and non-federate Boccia athletes showed a great effect in the Internal Visual subscale and a moderate effect in the External Visual subscale. It was also observed differences between athletes from different medical-sports groups, revealing that the requirements of the sport linked to their action abilities provides them with different Imagery abilities. These results clearly influence the prescription of imagery training programs for different groups taking into account different medical-practice groups.
- Imagery ability in Boccia: comparison among federate athletes from different medical sport groupsPublication . Amorim, André; Travassos, Bruno; Duarte-Mendes, PedroThe aim of this study was to analyse and compare movement visualization ability in federate and non-federate Boccia athletes, and among federate Boccia medical sport groups. Forty-two Boccia athletes (Federate N = 24; Non-federate N = 18) at an average age of 35.8 (SD = 11.19) participated in this study. The Portuguese version of Movement Imagery Questionnaire - 3 (MIQ-3), was used for this study. The participants were evaluated on the internal and external visual imagery. Statistics was carried out following the method of interference based on the magnitude of the effects. Results showed a great effect of expertise in imagery ability. The comparison between federate and non-federate Boccia athletes showed a great effect in the Internal Visual subscale and a moderate effect in the External Visual subscale. It was also observed differences between athletes from different medical-sports groups, revealing that the requirements of the sport linked to their action abilities provides them with different Imagery abilities. These results clearly influence the prescription of imagery training programs for different groups taking into account different medical-practice groups.
- Lesões no boxe em Portugal: análise da incidência, mecanismos, fatores de risco e medidas de prevenção de lesõesPublication . SottoMayor, Ricardo; Monteiro, Diogo; Alexandre, Élio; Jacinto, Miguel; Silva, Fernanda M.; Flores, Gonçalo; Travassos, Bruno; Duarte-Mendes, PedroIntrodução: A modalidade do boxe está associada a uma elevada taxa de lesões e traumatismos cranianos graves, onde a cabeça, os ombros, os punhos e as mãos são as regiões do corpo mais afetadas. Objetivos: este estudo teve como objetivos quantificar a incidência de lesões relacionadas com a prática de boxe e a identificação de padrões de lesões e fatores de risco. Além disso, foi analisada a eficácia de medidas preventivas de lesões e as adaptações comportamentais após lesão. Metodologia: Foi utilizado um questionário para a recolha dos dados dividido em três partes: dados pessoais, experiência de treino e exposição e lesões. Resultados: 583 questionários foram analisados. Os resultados mostraram que 76% dos indivíduos eram do sexo masculino, e 70,5% nunca competiram. O sparring foi a técnica que levou a 34,3% das lesões, e a inflamação foi a lesão mais comum (28,1%). Discussão: A literatura demonstra que a incidência de lesão diminuiu no boxe amador nos últimos anos, mantendo-se no profissional. A incidência de lesão é superior no boxe profissional e o sparring é a técnica que leva a um maior número de lesões. Os alongamentos parecem ser o comportamento preventivo mais comum após lesão. Conclusões: Este estudo permite demonstrar que a altura, a frequência de competição, o nível de competição e o treino de força são os fatores mais associadas ao número de lesões nos praticantes de boxe.
- Perceived effort in football athletes: The role of achievement goal theory and self-determination theoryPublication . Monteiro, Diogo; Teixeira, Diogo S.; Travassos, Bruno; Duarte-Mendes, Pedro; Moutão, João; Machado, Sérgio; Luís, CidThis study examined the motivational determinants of athletes perceived effort in football considering the four-stage motivational sequence at the contextual level proposed by Hierarchical Model of Intrinsic and Extrinsic Motivation: task-invoving climate, basic psychological needs, self-determined motivation (SDM), and perceived effort. Additionally, SEM multi-group analysis across different age-groups (U15, U17, U19, and U21 years) and serial mediation of basic psychological needs (BPNs) and SDM on the task-involving motivational climate and the perceived effort were also analyzed. Two independent samples of male football athletes (N = 403, N = 403), aged 13–20 years were enrolled in this study. The results support the adequacy of the structural model in explaining the perceived effort of football atheltes in all samples under analysis, and was invariant across U17, U19, and U21. However, it was not invariant across U15 and U17, U19 and U21. Furthermore, results from the serial mediation showed significant indirect effects in all samples, supporting self-determination theoretical assumptions, reinforcing the importance of BPNs satisfaction and behavioral regulation in the relation in analysis. The results show that when coaches promote a task-involving climate, the BPNs satisfaction of athletes improves. This climate will facilitate the regulation of their behaviors toward more autonomous forms of motivation, with positive outcomes in the athletes perceived effort.
- A review of players’ characterization and game performance on male rink-hockeyPublication . Ferraz, António; Santos, João Valente dos; Sarmento, Hugo; Duarte-Mendes, Pedro; Travassos, BrunoThe aim of this study was to review the evolutionary tendencies of research regarding to the study of male Rink-Hockey players´ and game performance. A systematic search was conducted in PubMed, Web of Knowledge and Scopus databases according to PRISMA method. The initial search identified 815 titles, resulting in 19 articles being included within the review. Original papers (English language) contained relevant data regarding rink hockey players' performance or morphological/physiological demands, anthropometry/body composition characteristics were eligible. Studies were classified into categories: (1) Physiological Demands, (2) Anthropometry and Body Composition, (3) Game Characterization/Patterns, (4) Injuries. Results indicated that Rink hockey requires high intensity effort which demands both short and long duration efforts requirements from players. Body composition analysis shows to be an important monitoring tool which complements the understanding of the athlete's cardiac adaptation. Game patterns shows a combination of specific game momentums with different outcomes according to the game zone. The intense short-term movements, collision and contact between players, in addition to the weight and speed of the hard ball and the stick, can considerably increase the risk of moderate and severe injuries. Lack of literature in Rink-Hockey is remarkable, and research is mainly focused on children and adolescents' players. Furthermore, the existing research with adult elite athletes was assessed with a small sample size.