Browsing by Author "Martinho, Diogo V."
Now showing 1 - 3 of 3
Results Per Page
Sort Options
- 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.
- 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 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.