Percorrer por autor "Martinho, Diogo V."
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- O consumo de hidratos de carbono em futebolistas masculinos: revisão sistemática e meta-análisePublication . Martinho, Diogo V.; Fernandes, Marlene; Loureiro, Helena S.; Fernandes, Joana; Lemos, João; Faria, AnaINTRODUÇÃO: As diretrizes relativas ao consumo de hidratos de carbono têm sido extensivamente discutidas. Apesar deste macronutriente ser reconhecidamente determinante no rendimento desportivo, escassas revisões sistemáticas e meta-análises foram conduzidas para avaliar a ingestão de hidratos de carbono em futebolistas masculinos. OBJETIVOS: O objetivo desta revisão sistemática, com meta-análise, foi avaliar a ingestão de hidratos de carbono em diferentes períodos da época competitiva. Adicionalmente, foi examinado o consumo de hidratos de carbono por grupo posicional. METODOLOGIA: As bases de dados utilizadas foram PubMed, SPORTDiscus e Web of Science Core Collection. Os estudos incluídos consideraram os seguintes critérios de elegibilidade: jogadores de futebol masculino, idade superior a 18 anos e consumo de hidratos de carbono expresso em g.kg-1.dia-1. RESULTADOS: Inicialmente, foram identificados 1992 artigos. Destes, 11 foram considerados elegíveis para a revisão sistemática e 10 foram incluídos na meta-análise. Os resultados demonstraram que os futebolistas masculinos, consomem em média, 4,3 g.kg-1.dia-1 e 5,0 g.kg-1.dia-1 nos períodos competitivos e preparatórios (pré-época), respetivamente. Não foi encontrado qualquer estudo que reportasse o consumo de hidratos de carbono durante a off-season. Apenas três estudos examinaram a variação do consumo de hidratos de carbono por grupo posicional. Embora as amostras sejam limitadas, os guarda-redes parecem ingerir uma menor quantidade de hidratos de carbono comparativamente a atletas de outras posições em campo. CONCLUSÕES: Considerando as limitações associadas às metodologias utilizadas para aferir o consumo de hidratos de carbono em atletas, a presente revisão sistemática realça a necessidade de desenvolver estratégias nutricionais para o cumprimento das diretrizes deste macronutriente.
- Emerging Technologies to Promote Fans Interaction in Football Events: A Systematic ReviewPublication . Martins, Francisco; França, Cíntia; Paixão, Pedro; Martinho, Diogo V.; Campos, Pedro; Gouveia, Bruna R.; Lopes, Hélder; Ihle, Andreas; Marques, Eduardo; Gouveia, Élvio Rúbio; Gouveia, BrunaAs the digital revolution continues to take hold in contemporary society, new technology and communications networks have provided football with new possibilities and prospects for expansion. This study provides an assessment of the published research regarding innovative digital tools designed to increase the interactivity of fans when watching a football match, regardless of whether they do it at home or at the stadium. A systematic review of the literature was performed, following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guideline. The search was conducted in the PubMed, Web of Science, and Scopus databases. The final sample included eleven studies for analysis. Overall, the investigations that structure this review seem to be in the early stages of their development, with eight of them making tests with the target audience and the other three still in protocol development processes. Six studies concluded that fans had positive and exciting experiences using mobile applications or interactive systems. Two studies showed promising results in the area of football fans’ health, and only one study showed some difficulties for fans using an ad hoc network in the stadium. Adding personal information, fan interaction systems, specific information about the players and the teams’ tactical strategies, and interactive fan voting seem to be important elements for designing a successful interactive tool that contributes to increasing fans’ enthusiasm during football matches.
- Intra‑observer reproducibility and inter‑observer agreement of Fels skeletal age assessments among male tennis players 8–16 yearsPublication . Sousa-e-Silva, Paulo; Coelho-e-Silva, Manuel J.; Celis-Moreno, Jorge M; Costa, Daniela C.; Martinho, Diogo V.; Ribeiro, Luis P.; Oliveira, Tomás; Gonçalves-Santos, João; Tavares, Oscar M.; Castanheira, Joaquim; Pereira, Telmo; Conde, Jorge; Cayolla, Ricardo R.; Duarte-Mendes, Pedro; Myburgh, Gillian K.; Cumming, Sean P.; Malina, Robert M.Background Skeletal age (SA) is an estimate of biological maturity status that is commonly used in sport-related medical examinations. This study considered intra-observer reproducibility and inter-observer agreement of SA assessments among male tennis players. Methods SA was assessed with the Fels method in 97 male tennis players with chronological ages (CA) spanning 8.7–16.8 years. Radiographs were evaluated by two independent trained observers. Based on the difference between SA and CA, players were classified as late, average or early maturing; if a player was skeletally mature, he was noted as such as an SA is not assigned. Results The magnitude of intra-individual differences between repeated SA assessments were d = 0.008 year (observer A) and d = 0.001 year (observer B); the respective coefficients of variation were 1.11% and 1.75%. Interobserver mean differences were negligible (t = 1.252, p = 0.210) and the intra-class correlation coefficient was nearly perfect (ICC = 0.995). Concordance of classifications of players by maturity status between observers was 90%. Conclusion Fels SA assessments were highly reproducible and showed an acceptable level of inter-observer agreement between trained examiners. Classifications of players by skeletal maturity status based on assessments of the two observers were highly concordant, though not 100%. The results highlight the importance of experienced observers in skeletal maturity assessments.
- Visual Information in Basketball Jump-Shots: Differences between Youth and Adult AthletesPublication . Marques, Rui; Martins, Fernando Manuel Lourenço; Gomes, Ricardo; Martinho, Diogo V.; Mendes, Rui; Moore, Sarah A.; Coelho-e-Silva, Manuel J.; Dias, Gonçalo Nuno FigueiredoBasketball shooting is a complex skill that requires visual routines and trained players typically evidence a specific oculomotor pattern. This study aimed to examine visual patterns in male novice youth and professional adult players while performing a jump shot. The sample included 20 basketball players grouped as under-16 youth (n = 10) and professional adult (n = 10) players. Each participant completed 50 shots at two distances (long range: 6.80 m; middle range: 4.23 m). Eye tracking glasses were used to obtain quiet eye (QE), the number of fixations, total fixation duration, duration of first and last fixation. An independent t-test was used to assess differences between groups. Shooting accuracy given by % of efficacy indicated that under-16 players attained poorer scores at both distances: long (t = −4.75, p < 0.01) and middle (t = −2.80, p < 0.012) distance. The groups also differed in QE time (long: 600 ms vs. 551 ms; middle: 572 ms vs. 504 ms) and total duration of the fixations (long: 663 ms vs. 606 ms; middle: 663 ms vs. 564 ms) in both long and middle distance shots. Significant differences also occurred in the last fixation (long distance: t = −4.301, p < 0.01; middle distance: t = −3.656, p < 0.01) with professional adult players presenting the value of, on average, 454–458 ms, while youth shooters 363–372 ms. In summary, visual strategy differed between under-16 youth and professional adult basketball players. To support their long-term sport development, it is recommended that youth basketball players focus their attention with longer final fixation before releasing the ball to improve their shot.
- Visual Patterns of U16 athletes and professional basketball playersPublication . Marques, Rui; Dias, Gonçalo; M. L. Martins, Fernando; Gomes, Ricardo; Mendes, Rodrigo; Martinho, Diogo V.; Coelho-e-Silva, M. ou Coelho-e-Silva, M.J. ou Coelho-Silva, M ou Silva, M.; Mendes, RuiThis work aimed to compare the visual patterns of under 16 (U16) athletes and professional basketball players. The sample was composed of 10 U16 (aged 15.2 ± 0.4 years; 7.1 ± 2.5 years of experience) and 10 professional (aged 27.6 ± 3.7 years; 18.4 ± 4.6 years of experience) basketball players. All athletes were males and right-handed. Each participant performed 50 jump shots from 10 different positions and 5 different angle shots (0°, 45°, 90°, 135° and 180°). Number of fixations, time of first and last fixation, total fixation duration and Quiet Eye (QE) time of all shots were analysed. Overall, results indicated that the U16 group showed greater within-group differences regarding shot positions, last fixation times, shot angles, and first and last fixation times. Additionally, the U16 group presented different visual strategies than those of professional players, with significant differences found for shooting positions and shot angles, particularly for shots performed on the left side of the field, and for QE times. In conclusion, our results add to the understanding that longer fixation times and longer QE time are associated with better jump-shot efficacy, and this relation is evident when comparing players of different age groups.