Browsing by Author "Rebelo, Miguel"
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- Alterações nas habilidades Motoras em crianças com um ano de idade após confinamento pela COVID-19Publication . Rebelo, Miguel; Rebelo, Miguel; Petrica, João; Batista, Marco; Duarte-Mendes, Pedro; Paulo, Rui; Honório, Samuel; Silveira, Paulo; Serrano, João; Centro de Publicações /Universidade da Maia - Centro de Investigação me Desporto Saúde e Desenvolvimento HumanoO Objetivo do estudo foi verificar os efeitos desse confinamento nas habilidades motoras através de um estudo longitudinal em crianças que no início da pandemia tinham um ano de idade. A amostra foi de 12 crianças de ambos os sexos, na avaliação pré-covid tinham 12.21±2.5 meses e na avaliação pós-covid as mesmas crianças já tinham 48.21±2.6 meses. As habilidades motoras foram avaliadas usando as escalas da PDMS-2. Para a análise estatística, foi utilizado o teste de shapiro-wilk para testar a normalidade e o teste Wilcoxon para comparar os resultados das duas avaliações na mesma amostra. Houve diferenças estatisticamente significativas nas habilidades Posturais, de Locomoção, de Manipulação de Objetos, de Preensão fina (p < 0,01) e de Integração Visuo-Motora (p = 0,008). As crianças na avaliação pós-covid apresentaram, em média, piores resultados em todas as habilidades da Motricidade Global, ao contrário da Motricidade Fina, em que apresentaram melhores resultados na avaliação pós-covid. Estes resultados mostram o impacto negativo da pandemia nas crianças avaliadas com especial enfase na motricidade global, em que a maioria demonstra valores considerados abaixo da média para a idade, nomeadamente nas habilidades posturais, locomotoras e manipulativas e que esta pandemia pode ter trazido graves consequências ao desenvolvimento motor das crianças alertando os profissionais que lidam diariamente com as crianças destas faixas etárias a importância da motricidade global.
- Análise comparativa da motricidade global e fina em crianças entre os 24 e os 48 meses.Publication . Adrião, Rafael; Rebelo, Miguel; Rocha, João; Farinha, Carlos; Silva Batista, Marco Alexandre; Serrano, João; Vaz, Vasco; Silva, Manuel Coelho e; Cordovil, Rita; Mendes, RuiEste estudo teve como objetivo comparar o desenvolvimento da motricidade global e fina em crianças entre os 24 e os 48 meses de idade, utilizando a bateria PDMS-2 como instrumento de avaliação. A amostra é composta por 193 crianças distribuídas em três grupos etários: 24 meses (N=22, 27.09±0.7 meses), 36 meses (N=78, 38.12±0.9 meses) e 48 meses (N=93, 49.45±1.1 meses). Foram analisadas as habilidades de Controle Postural, Locomoção, Manipulação de Objetos, Preensão Fina e Integração Visuomotora, agrupadas em dois domínios principais, a motricidade global e a motricidade fina. A análise estatística foi realizada através do teste de Kruskal-Wallis e do teste de Wilcoxon para amostras relacionadas, complementados pela medida de efeito épsilon quadrado (ε²). Os resultados revelaram diferenças estatisticamente significativas entre os quocientes motores globais (QMG) e finos (QMF) em todas as faixas etárias (p<0.001), indicando que o desenvolvimento motor fino é superior ao global. Observou-se uma tendência decrescente nos valores do QMG com o aumento da idade (ε² = 0.15), enquanto o QMF se manteve dentro da média normativa (ε² = 0.03), com menor dispersão e maior estabilidade. O Quociente Motor Total (QMT) apresentou uma evolução não linear, reforçando a ideia de que o desenvolvimento motor não ocorre de forma contínua. Estes resultados apontam para um desenvolvimento motor assimétrico entre os domínios global e fino, destacando a motricidade global como mais sensível à idade e ao contexto, e sugerindo a necessidade de estratégias de intervenção específicas para estimular essas competências em idades críticas.
- Analysis of anthropometric and physical performance variables in U-17 soccer playersPublication . Honório, Samuel; Batista, Marco; Serrano, João; Vandoni, Matteo; Rebelo, Miguel; Vieira, Fernando; Lopes, André; Santos, JorgeSoccer is considered a multifaceted collective sport, and to reach an elevated level, players must have moderate to high power, good agility, joint flexibility and muscle development. Also, players must be able to generate high torques during fast movements, which implies the development of different capacities, understood as multifactorial preparation. The objective was to analyse the effects of training (aerobic and continuous) on the leg power, fatigue levels, speed, agility, body fat, muscle mass and bone mass of these players. Methods. Seventy-two soccer players, male and under 17, from 4 teams that participated. The teams performed 3 times a week training sessions of about 60 to 90 minutes each. Informed consent requests were given to their parents for authorisation to participate in this investigation. Data was collected in two different time points, about ten months apart. Specific tests were performed for each variable: the vertical jump with Bosco System for leg power, the T-Test for agility, the linear sprint test for speed and the RAST test for fatigue levels. A precision Tanita scale was used for the anthropometric tests such as body fat, muscle mass and bone mass. Statistical procedures were applied through the Wilcoxon test to compare the two time points of evaluation. Conclusions: the implemented training improved all the analysed variables with significant statistical values for leg power, speed, bone mass, muscle mass and fat mass.
- Analysis of the predominance of technical actions used in the 2021 European Judo Championship depending on combat time and golden scorePublication . Batista, Marco; Torres, Diana; Sombra, Katia; Honório, Samuel; Santos, Jorge; Galan-Arroyo, Carmén; Rebelo, Miguel; Silveira, Paulo; Louro, Hugo gonçalo DuarteThe interest of this study perspective, which allows us to interpret competitive action in more detail, is also important to reflect that according to the legal adaptations dictated by the rules of a modality, it makes its study necessary. The objective was to analyse the predominance of technical actions used in the 2021 European Judo Championship based on combat time and golden score. The study sample focused on 400 combats of the European Judo Championship 2021. We used an observation system created for this purpose, according to the classification system proposed by Kodokan. Cross-frequency tables were produced, where the association degree between variables was analysed using the Chi Square test, where the significance level was set at p ≤ .05. We complemented the association analysis between variables by calculating the adjusted standardized residuals. The predominance of techniques and their effectiveness presented a similar hierarchy in both the combat and golden score phases. In golden score, women showed a significant association with hip techniques and men with frontal sacrifice techniques. Female athletes proved to be more effective in percentage terms in the golden score phase.
- Associations between body mass index, physical activity, perceived school competence, and academic performance in Portuguese elementary studentsPublication . Rebelo, Miguel; Serrano, João; HONÓRIO, SAMUEL; Santos, Jorge; Marques, Catarina; Silva Batista, Marco AlexandreBackground/Objectives: Childhood is a critical stage for consolidating health-related habits that shape physical, cognitive, and socio-emotional development. Regular physical activity has been linked to fitness and academic outcomes, while high body mass index (BMI) may hinder school performance. This study examined associations between BMI, perceived school competence, academic performance, and weekly physical activity volume in Portuguese elementary students, addressing a gap in national evidence compared with international studies. Methods: A cross-sectional correlational design was adopted with 531 children (M = 9.13 years) from 10 public schools. BMI was calculated from anthropometric measures, weekly physical activity was self-reported, perceived competence was assessed with Harter’s Self-Concept Scale (Cronbach’s α = 0.797), and academic performance was obtained from school records. Analyses included Pearson correlations, ANOVA with Scheffé post hoc, and multiple regression, with exact significance values reported. Results: Higher BMI was negatively associated with perceived competence and academic achievement, while regular physical activity, particularly 4–6 h per week, was linked to better results in Portuguese and mathematics. Associations were modest (r = 0.18–0.32; R2 = 0.12). Regression showed physical activity (β = 0.093, p = 0.033) and perceived competence (β = 0.126, p = 0.004) predicted academic performance, whereas BMI was not (β = −0.028, p = 0.524). The near-zero correlation with environmental studies suggests subject-specific influences. Conclusions: Adequate BMI and regular physical activity are associated with better academic performance. The role of perceived competence is theoretically inferred as a potential mediator, but not formally tested. Findings highlight the interplay of physical, cognitive, and psychosocial factors. Structured school-based activity programs of 4–6 h weekly may promote both health and learning.
- Body composition, strength and muscle power indices at the different competitive levels of FutsalPublication . Rebelo, Miguel; Marques, Catarina; Crisóstomo, Rute; Silva Batista, Marco Alexandre; Paulo, Rui; Duarte-Mendes, Pedro; HONÓRIO, SAMUEL; Serrano, JoãoObjective: The aim was to verify the differences in physical condition (body composition, power and muscle strength) in futsal players from three competitive levels. Methodology: Sixty-eight (24.26 ± 4.63 years old) Portuguese futsal players participated in the study, divided into: elite, sub-elite and amateur. We used the bioimpedance, the countermovement jump and the isokinetic dynamometer to assess physical condition, and the Kruskal-Wallis test to compare variables between groups. Results: There were no differences in body composition between groups. Elite players had higher countermovement jump heights than amateur players (p < 0.001). There were significant differences in the isokinetic muscle strength of the knee flexors, with the elite players showing more strength than the amateur players (p = 0.047). Discussion: The results of the research should be contrasted with those of other research found in the literature. Conclusions: The elite players had higher physical condition parameters (more lower limb power and more flexor muscle strength) compared to the amateur players. We would point out that all groups had a high probability of lower limb muscle injury (H/Q ratio < 60%) at this stage of the sports season, alerting training professionals to the importance of individualised physical condition analysis.
- Comparative study of physical activity, leisure preferences, and sedentary behavior among portuguese, italian, and spanish university studentsPublication . Paulo, Rui; Ramalho, André; Scursatone, Isabella; Caire, Maria; Calle, Nicolás Bores; Bores-García, Daniel; Espada, María; Rebelo, Miguel; Duarte-Mendes, PedroObjective: The objective of this study is to describe and compare the levels of physical activity, preferences for leisure-time physical activity, and the frequency of non-sedentary behaviors of Portuguese, Italian, and Spanish students attending higher education. Methods: A total of 1354 students (21.2 ± 2.9 years) participated in the study, with data collected through an online questionnaire for 6 months. Results: The highest levels of sedentary behavior are found among Spanish students, followed by the Portuguese, and lastly the Italians. In relation to physical activity levels, Spanish students perform more low and moderate physical activity, while Italian students perform more vigorous activities and naturally have a lower level of sedentary behavior. Conclusions: However, it is worth highlighting that students from all three countries reach the minimum levels of physical activity recommended by the WHO.
- Descriptive analysis of injury types and incidence during futsal preseason across different competitive levelsPublication . Marques, Catarina; Rebelo, Miguel; Crisóstomo, Rute; Honório, Samuel; Duarte-Mendes, Pedro; Petrica, João; Serrano, JoãoIntroduction: This study aimed to verify the typology and incidence of injury by comparing the different competitive levels of futsal during the preseason. Methods: The sample consisted of 68 senior male futsal players (24.26 ± 4.63 years). Data were collected using an injury recording grid that examined the affected body part, anatomical region, type of injury, mechanism, and severity. Results: It was found that the elite group has the lowest incidence rate of injury (4.8 injuries per 1,000 h of exposure) compared to the sub-elite (11.8 injuries per 1,000 h of exposure) and amateur groups (13.9 injuries per 1,000 h of exposure). However, at this level, there is the highest percentage of injury occurrence (38.5%), the lower limb was the most affected part of the body (30.8%), and ligament (23.1%) and muscle (15.4%) injuries are the most prevalent. The most frequent mechanism of injury was non-traumatic (30.8%), and the majority were moderate injuries in the elite (23.1%) and sub-elite (17.9%) groups and severe injuries in the amateur group (12.5%). Discussion: The amateur futsal players had the highest incidence of injury during the preseason period compared to the other competitive levels. Still, it was at the elite level where the highest percentage of injuries occurred, most of them nontraumatic and of ligament origin, primarily affecting the ankle region. The results highlight the importance of adopting specific injury prevention programs for ligament and muscle injuries during the preseason phase, regardless of the competitive level.
- Desenvolvimento motor da criança: relação entre habilidades motoras globais, habilidades motoras finas e idadePublication . Rebelo, Miguel; Serrano, João; Duarte-Mendes, Pedro; Paulo, Rui; Marinho, DanielO presente estudo sobre o desenvolvimento Motor da criança nos primeiros meses de vida, teve como objetivo verificar a relação entre as Habilidades Motoras e a Idade, e a relação entre as habilidades motoras Globais e Finas em crianças dos 12 aos 46 meses. Para o efeito, desenvolvemos um estudo de natureza quantitativa, com uma amostra de 405 crianças com idades compreendidas entre os 12 e os 46 meses, de ambos os géneros. Os instrumentos usados no estudo foram as Peabody Developmental Motor Scales-2 (PDMS-2). Em termos globais os resultados indicam que existe uma tendência para correlações positivas (maioritariamente moderadas e baixas) entre as variáveis Idade, Habilidades Motoras Globais e Habilidades Motoras Finas, salientando a correlação positiva moderada (p≤0.05; r2=0.265; 0.5≤ r ≤0.7) entre a Idade e a Motricidade Fina e por sua vez uma correlação positiva pequena (p≤0.05; r2=0.217; 0.1≤ r ≤ 0.3) entre a Idade e a Motricidade Global. Podemos assim contatar, uma melhoria destas habilidades à medida que as crianças vão crescendo, salientando melhores resultados na Motricidade Fina.
- Diferenças nas habilidades motoras em crianças entre os 12 e os 23 meses, considerando o tempo da amamentaçãoPublication . Rebelo, Miguel; Serrano, João; Petrica, João; Faustino, António; Duarte-Mendes, Pedro; Paulo, Rui; Marinho, DanielO objetivo deste estudo foi verificar se existem diferenças no desenvolvimento das habilidades motoras (globais e finas) comparando crianças que ainda eram amamentadas por leite materno com as que já não eram ou nunca foram amamentadas. A amostra é de 153 crianças de ambos os sexos (18,22±2,98 meses), 58 ainda são amamentadas por leite materno (17,59±1,92 meses) e 95 já não são amamentadas por leite materno ou nunca foram (19,81±2,95 meses). As habilidades motoras foram avaliadas usando as escalas da PDMS-2. Houve diferenças estatisticamente significantes nas habilidades de locomoção, manipulação fina, integração visuo-motora e na Motricidade Fina. As crianças ainda amamentadas apresentaram, em média, melhores resultados em todas as habilidades motoras, com mais enfase nas habilidades motoras finas. Estes resultados mostram que continuar a amamentar a criança com leite materno pode trazer benefícios, não só nutricionais, imunológicos, psicológicos e sociais(1), mas também na competência motora. O que reforça a sugestão da OMS da importância de continuar-se a implementar medidas que promovam um maior sucesso do aleitamento materno(1), nomeadamente na duração da amamentação após os 6 meses de idade(2).
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