Percorrer por autor "Mendes, Rui"
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- Abdominal wall muscle ultrasound assessment and level of experience in Pilates - an exploratory studyPublication . Pereira, Mário; André, Alexandra; Dias, Gonçalo Nuno Figueiredo; Castro, Maria António; Mendes, Rui; Martins, Fernando Manuel Lourenço; Gomes, Ricardo; Vaz, VascoThe core refers to a group of muscles that allow optimal force transfer along the body’s kinetic chain and is critical for movement. The goal of this quasi-experimental study was to investigate the relationship between the experience level of Pilates participants and abdominal wall thickness. For this, we compared the thickness of four abdominal muscles—transversus abdominis (TrA), internal oblique (IO), external oblique (EO), and rectus abdominis (RA)—as measured before and after 8 weeks of Pilates training in three conditions, namely, relaxation, abdominal hollowing, and plank exercise. Eighteen participants were distributed into three groups with different levels of Pilates practice—experienced (EG; n=6), inexperienced (IG; n=7), and control (CG; n=5) groups. The RA showed a tendency to increase post-intervention in the EG (all conditions: p=0,002, p=0,006, and p=0,002, respectively for relaxation condition, abdominal hollowing and standing plank). Additionally, significant differences were found in relaxation (p=0.003, d=−0.744) and plank (p=0.009, d=−0.630) conditions in the IG. Significant differences were also registered in the EO muscle in the IG (all conditions: p=0.046, p=0.013, and p=0.008, respectively; d=0.464, d=−0.596, and d=−0.637, respectively). IO muscle thickness tended to increase in the CG in all conditions (p=0.044, p=0.006, and p<0.001, respectively) and the EG in relaxation and plank conditions (p=0.009 and p=0.007, respectively). Within groups, the effects of Pilates practice were more significant post-intervention, with the exceptions being under the contraction condition in the deepest muscles (IO: p=0.109, d=0.083; TrA: p=0.194, d=0.062). Our hypothesis was partially confirmed because 8 weeks of Pilates practice have improved significantly the thickness of the RA and EO muscles in the IG.
- Abdominal wall muscle ultrasound assessment and level of experience in Pilates - an exploratory studyPublication . Pereira, Mário; André, Alexandra; Dias, Gonçalo Nuno Figueiredo; Castro, Maria António; Mendes, Rui; Martins, Fernando Manuel Lourenço; Gomes, Ricardo; Vaz, VascoThe core refers to a group of muscles that allow optimal force transfer along the body’s kinetic chain and is critical for movement. The goal of this quasi-experimental study was to investigate the relationship between the experience level of Pilates participants and abdominal wall thickness. For this, we compared the thickness of four abdominal muscles—transversus abdominis (TrA), internal oblique (IO), external oblique (EO), and rectus abdominis (RA)—as measured before and after 8 weeks of Pilates training in three conditions, namely, relaxation, abdominal hollowing, and plank exercise. Eighteen participants were distributed into three groups with different levels of Pilates practice—experienced (EG; n=6), inexperienced (IG; n=7), and control (CG; n=5) groups. The RA showed a tendency to increase post-intervention in the EG (all conditions: p=0,002, p=0,006, and p=0,002, respectively for relaxation condition, abdominal hollowing and standing plank). Additionally, significant differences were found in relaxation (p=0.003, d=−0.744) and plank (p=0.009, d=−0.630) conditions in the IG. Significant differences were also registered in the EO muscle in the IG (all conditions: p=0.046, p=0.013, and p=0.008, respectively; d=0.464, d=−0.596, and d=−0.637, respectively). IO muscle thickness tended to increase in the CG in all conditions (p=0.044, p=0.006, and p<0.001, respectively) and the EG in relaxation and plank conditions (p=0.009 and p=0.007, respectively). Within groups, the effects of Pilates practice were more significant post-intervention, with the exceptions being under the contraction condition in the deepest muscles (IO: p=0.109, d=0.083; TrA: p=0.194, d=0.062). Our hypothesis was partially confirmed because 8 weeks of Pilates practice have improved significantly the thickness of the RA and EO muscles in the IG.
- Uma abordagem multidisciplinar para o ensino de técnicos em jogo desportivos coletivosPublication . Manuel Clemente, Filipe; M. L. Martins, Fernando; Mendes, Rui
- Accuracy of pattern detection methods in the performance of golf puttingPublication . Couceiro, Micael; Dias, Gonçalo; Mendes, Rui; Araújo, DuarteThe authors present a comparison of the classification accuracy of 5 pattern detection methods in the performance of golf putting. The detection of the position of the golf club was performed using a computer vision technique followed by the estimation algorithm Darwinian particle swarm optimization to obtain a kinematical model of each trial. The estimated parameters of the models were subsequently used as sample of five classification algorithms: (a) linear discriminant analysis, (b) quadratic discriminant analysis, (c) naive Bayes with normal distribution, (d) naive Bayes with kernel smoothing density estimate, and (e) least squares support vector machines. Beyond testing the performance of each classification method, it was also possible to identify a putting signature that characterized each golf player. It may be concluded that these methods can be applied to the study of coordination and motor control on the putting performance, allowing for the analysis of the intra- and interpersonal variability of motor behavior in performance contexts.
- Activity profiles of soccer players during the 2010 World CupPublication . Clemente, Filipe Manuel; Couceiro, Micael; M. L. Martins, Fernando; Ivanova, Monika Ognyanova; Mendes, RuiThe main objective of this study was to analyse the distance covered and the activity profile that players presented at the FIFA World Cup in 2010. Complementarily, the distance covered by each team within the same competition was analysed. For the purposes of this study 443 players were analysed, of which 35 were goalkeepers, 84 were external defenders, 77 were central defenders, 182 were midfielders, and 65 were forwards. Afterwards, a thorough analysis was performed on 16 teams that reached the group stage, 8 teams that achieved the round of 16, 4 teams that reached the quarter-finals, and 4 teams that qualified for the semi-finals and finals. A comparison of the mean distance covered per minute among the playing positions showed statistically significant differences (F(4,438) = 559.283; p ˂ 0.001; 2 = 0.836; Power = 1.00). A comparison of the activity time among tactical positions also resulted in statistically significant differences, specifically, low activity (F(4,183.371) = 1476.844; p ˂ 0.001; 2 = 0.742; Power = 1.00), medium activity (F(4,183.370) = 1408.106; p ˂ 0.001; 2 = 0.731; Power = 1.00), and high activity (F(4,182.861) = 1152.508; p ˂ 0.001; 2 = 0.703; Power = 1.00). Comparing the mean distance covered by teams, differences that are not statistically significant were observed (F(3,9.651) = 4.337; p ˂ 0.035; 2 = 0.206; Power = 0.541). In conclusion, the tactical positions of the players and their specific tasks influence the activity profile and physical demands during a match.
- Acute effects of different formats of small-sided and conditioned handball games on heart rate responses in female students during PE classesPublication . Manuel Clemente, Filipe; Rocha, Rúben Filipe; M. L. Martins, Fernando; Mendes, RuiThe aim of this study was to analyze the impact of different formats (2-a-side, 3- a-side and 4-a-side) on heart rate responses of female students during small-sided and conditioned handball games. The heart rate responses were measured using heart rate monitors during physical education classes. Eight female students participated in the study (15 ± 0.0 years). The one-way ANOVA showed statistical differences with moderate effect between the three different formats (F(2, 1674) = 86.538; p-value ˂ 0.001; ! = 0.094; Power = 1.0). The results showed that smaller formats (2-a-side and 3-a-side) increased the heart rate responses of female students during small-sided and conditioned handball games during physical education (PE) classes. The results also suggested that 2-a-side games can be used for anaerobic workouts and the 3-a-side and 4-a-side games can be better used to reach lactate-threshold and for aerobic workouts of high intensity
- Acute effects of the number of players and scoring method on physiological, physical, and technical performance in small-sided soccer gamesPublication . Manuel Clemente, Filipe; Wong, Del P.; M. L. Martins, Fernando; Mendes, RuiThis study aims to examine the effect of differences in the number of players and scoring method on heart rate responses, time–motion characteristics, and technical/tactical performance during small-sided soccer games. Ten male amateur soccer players (26.4 ± 5.3 years old, 8.4 ± 3.2 years of practice, 179.3 ± 5.2 cm body height, 71.2 ± 7.1 kg body weight, 45.8 ± 2.6 ml.kg–1min–1VO2max) from the Portuguese regional league played nine different small-sided games (i.e., 3 formats × 3 scoring methods). The study used two-way MANOVA, two-away ANOVA, and one-way ANOVA, depending on the specific procedure for the analysis. Compared with other formats, 2v2 induced significantly greater values of technical/tactical indexes (p = 0.001), 3v3 induced significantly higher %HRreserve values (p = 0.001), and 4v4 led to significantly greater distance coverage and speed (p = 0.001). The study provided evidence for coaches to set different small-sided game conditions depending on the training purpose in terms of physiological, physical, and technical performance.
- ADAPTAÇÃO E VALIDAÇÃO DAS PROPRIEDADES PSICOMÉTRICAS DO INVENTÁRIO DA ATENÇÃO PLENA PARA ATLETAS DE HANDEBOL DO BRASIL (MIS-HBR)Publication . Martiny, Luis Eugênio; Carraça, Bruno; Magalhães, Cátia; Ferreira, José Pedro; Dias, Gonçalo Nuno Figueiredo; Mendes, RuiO objetivo deste estudo foi realizar a adaptação e validação transcultural do Inventário de Atenção Plena para o contexto desportivo, especificamente para atletas de handebol do Brasil (MIS-HBr). O MIS-HBr foi aplicado em uma amostra total de 289 atletas, sendo 111 mulheres (38.4%) e 178 homens (61.6%), com idades entre 17 e 56 anos (M=25.2 DP+8.75). O coeficiente de validação de conteúdo total foi calculado em CVCtotal=0.93. A validação do instrumento teve por base a realização de uma caracterização psicométrica, bem como Análise Fatorial Confirmatória e posterior Análise Fatorial Exploratória. O modelo alcançou um bom ajuste global entre os três fatores (Estar consciente, Não julgamento e Reorientação), com X² (84) =140, p<.001, razão X²/gl =1,66. Também se obteve bons valores de RMSEA = 0.048 IC 95% [0.034, 0.062], SRMR=0.053, CFI (0.951) e TLI (0.938). Os três fatores do MIS-HBr apresentaram boa consistência interna de acordo com o alpha de Cronbach (estar consciente: α=0.743, Não julgamento: α=0.806 e Reorientação α=0.690. O modelo alcançou invariância métrico entre o multi-grupo gênero, invariância escalar no multi-grupo categoria e invariância estrita no multi-grupo status do atleta. Consequentemente, o MIS-HBr apresenta uma adequada validação para os atletas de handebol do Brasil e revela potencial para uso em investigações futuras.
- Alimentação, estilos de vida, prática desportiva, composição corporal e competência motora em crianças do ensino Pré-escolar e 1.º CEB (FORMIGA - Montemor-o-Velho)Publication . Campos, Francisco; Melo, Ricardo; M. L. Martins, Fernando; Damásio, António Sérgio; Mendes, Rui; Gomes, Ricardo
- An online tactical metrics applied to football gamePublication . Manuel Clemente, Filipe; Couceiro, Micael; M. L. Martins, Fernando; Mendes, RuiIn collective sports, the match analysis is fundamental in order to improve the quality of coaches’ intervention. Nevertheless, the generality of the systems are based on notational analysis which does not allow a deep understanding about the collective behaviour of the team. Therefore, the main goal of this study is to update and design new tactical metrics that allows an improved online knowledge about the teams’ behaviour. Tactical metrics such as the teams’ centroid, teams’ stretch index and teams’ effective play area will be presented throughout this study, validated by means of a single match experimental case study. Results suggest the potential of the herein proposed tactical metrics, providing relevant and online information to the coaches over time, thus allowing new opportunities to improve the quality of their intervention.