Repositório Científico da UMAIA (Univ. da Maia)
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The use of physical activity trackers devices and physical activity levels in adolescents and adults
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The Arrowhead Agility Test: Reliability, Minimum Detectable Change, and Practical Applications in Soccer Players
No full textRago, V, Brito, J, Figueiredo, P, Ermidis, G, Barreira, D, and Rebelo, A. The arrowhead agility test: Reliability, minimum detectable change, and practical applications in soccer players. J Strength Cond Res 34(2): 483-494, 2020-Four independent studies were conducted to examine the utility of the arrowhead agility test (AAT) to measure change of direction (COD) capacity in soccer players, specifically, (a) intersession reliability and minimum detectable change (n = 24); (b) power-dependent abilities associated with AAT performance (n = 56); and (c) fatigue sensitivity (n = 20); differences between competitive levels and age groups (n = 264). Irrespective of the AAT outcome measure (skillful side, less-skillful side, sum of both), intersession reliability and the ability to detect changes in performance were good (ICC = 0.80-0.83; CV = 1.25-2.21%; smallest worthwhile change, 0.06-0.12 >SEM, 0.01-0.03) except for the asymmetry index. A 15-m sprint explained a significant amount of variance in COD (p < 0.01; R = 0.42). Arrowhead agility test performance did not change from the prematch toward half time (p = 0.21). However, reduced COD performance was observed after an intense period in the second half and after the game, compared with prematch and half-time performance (p < 0.05; effect size [ES] = -0.85 to 0.42). Irrespective of age group, national players were more agile than regional players (p < 0.05; ES = -1.97 to -0.36). Moreover, independently of their competitive level, senior and U18 players had a better performance than U16 (p < 0.05; ES = -2.33 to -0.84), whereas no significant differences were observed between senior and U18. Percentiles were also reported in the results. The AAT is reliable to measure COD in soccer players. The test may simultaneously encompass 15-m sprint testing but should be implemented independently to countermovement jump. Furthermore, the test is sensitive to match-induced fatigue during the second half and discriminates players from different competitive levels.info:eu-repo/semantics/publishedVersio
Application of Individualized Speed Zones to Quantify External Training Load in Professional Soccer
Get PDFThis study aimed to examine the interchangeability of two external training load (ETL) monitoring methods: arbitrary vs. individualized speed zones. Thirteen male outfield players from a professional soccer team were monitored during training sessions using 10-Hz GPS units over an 8-week competitive period (n = 302 observations). Low-speed activities (LSA), moderate-speed running (MSR), high-speed running (HSR) and sprinting were defined using arbitrary speed zones as <14.4, 14.4-19.8, 19.8-25.1 and ≥25.2 km·h-1, and using individualized speed zones based on a combination of maximal aerobic speed (MAS, derived from the Yo-yo Intermittent recovery test level 1), maximal sprinting speed (MSS, derived from the maximal speed reached during training) and anaerobic speed reserve (ASR) as <80% MAS, 80-100% MAS, 100% MAS or 29% ASR and ≥30% ASR. Distance covered in both arbitrary and individualized methods was almost certainly correlated in all speed zones (p < 0.01; r = 0.67-0.78). However, significant differences between methods were observed in all speed zones (p < 0.01). LSA was almost certainly higher when using the arbitrary method than when using the individualized method (p < 0.01; ES = 5.47 [5.18; 5.76], respectively). Conversely, MSR, HSR and sprinting speed were higher in the individualized method than in the arbitrary method (p < 0.01; ES = 5.10 [4.82; 5.37], 0.86 [0.72; 1.00] and 1.22 [1.08; 1.37], respectively). Arbitrary and individualized methods for ETL quantification based on speed zones showed similar sensitivity in depicting player locomotor demands. However, since these methods significantly differ at absolute level (based on measurement bias), arbitrary and individualized speed zones should not be used interchangeably.info:eu-repo/semantics/publishedVersio
A Review on Adventitious Lactic Acid Bacteria from Table Olives
No full textSpontaneous fermentation constitutes the basis of the chief natural method of processing of table olives, where autochthonous strains of lactic acid bacteria (LAB) play a dominant role. A thorough literature search has unfolded 197 reports worldwide, published in the last two decades, that indicate an increasing interest in table olive-borne LAB, especially in Mediterranean countries. This review attempted to extract extra information from such a large body of work, namely, in terms of correlations between LAB strains isolated, manufacture processes, olive types, and geographical regions. Spain produces mostly green olives by Spanish-style treatment, whereas Italy and Greece produce mainly green and black olives, respectively, by both natural and Spanish-style. More than 40 species belonging to nine genera of LAB have been described; the genus most often cited is Lactobacillus, with L. plantarum and L. pentosus as most frequent species-irrespective of country, processing method, or olive type. Certain LAB species are typically associated with cultivar, e.g., Lactobacillus parafarraginis with Spanish Manzanilla, or L. paraplantarum with Greek Kalamata and Conservolea, Portuguese Galega, and Italian Tonda di Cagliari. Despite the potential of native LAB to serve as starter cultures, extensive research and development efforts are still needed before this becomes a commercial reality in table olive fermentation.info:eu-repo/semantics/publishedVersio
The Role of School Social Support and School Social Climate in Dating Violence Victimization Prevention among Adolescents in Europe
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ABUSO SEXUAL NO DESPORTO – CARACTERIZAÇÃO DO FENÓMENO NUMA AMOSTRA PORTUGUESA
No full textO abuso sexual é uma temática estudada na sua generalidade quer ao nível da sua prevalência e contextos, como também ao nível das suas repercussões físicas e psicológicas nas vítimas. Relativamente ao desporto é notório o reconhecimento dos seus benefícios, assim como os problemas de saúde associados à sua prática, podendo estes ser provenientes de violência acidental ou até mesmo de lesões. Não obstante, no que
concerne a problemas relacionados com a violência não-acidental, nomeadamente abuso sexual, pouco se investigam os abusos sexuais comparativamente aos incidentes resultantes da prática desportiva.N/
Relatório de estágio nos Sub-16 do Sporting Clube de Braga
No full textO futebol tem sofrido ao longo dos anos uma grande evolução nos diversos campos que este abrange, com especial relevo para o paradigma físico onde é possível quantificar a evolução ao longo dos anos e se verifica um aumento do número de sprints, das ações de alta intensidade, da distância de sprint, do número de passes e do número de ações por jogo (Barnes, Archer, Hogg, Bush, & Bradley, 2014). Este desenvolvimento no
panorama físico, só é possível devido à otimização da preparação física dos atletas de elite.N/
Relatório de estágio nos Sub-16 do Sporting Clube de Braga
Get PDFO presente relatório visa o desenvolvimento da prática de um treinador adjunto no escalão de sub-16 do Sporting Clube de Braga e também um compêndio de reflexões sobre o processo de estágio e da atividade profissional desenvolvida durante a época. Foi realizada também, simultaneamente, uma investigação científica como complemento ao estágio efetuado. Desta forma, concretizou-se uma análise à rede de passes dos jogadores do escalão de sub-16 do Sporting Clube de Braga em diferentes formações táticas utilizadas.
Foram analisados cinco jogos de cada formação tática e procurou-se perceber se existiam alterações na rede de passes dos jogadores entre diferentes formações táticas e de que forma é que possíveis alterações poderiam tornar-se informação pertinente na tomada de decisão do treinador.N/
Os Museus e as Tecnologias Digitais Móveis: Proposta de Aplicações para o Paço dos Duques de Bragança
Get PDFOs museus, desde há muito tempo, que tentam encontrar formas para envolver os seus públicos com as suas coleções. Recorrendo ao uso das tecnologias digitais móveis, os museus podem proporcionar aos seus visitantes um acesso mais interativo ao espaço a visitar, bem como às suas coleções, às quais, por razões de conservação e segurança, não é permitido um contacto diretoN/