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Single camera analyses in studying pattern forming dynamics of player interacti...
Duarte, Ricardo; Fernandes, Orlando; Folgado, Hugo; Araújo, DuarteA network of patterned interactions between players characterises team ball sports. Thus, interpersonal coordination patterns are an important topic in the study of performance in such sports. A very useful method has been the study of inter-individual interactions captured by a single camera filming an extended performance area. The appropriate collection of positional data allows investigating the pattern for...
Trunk muscle activation during golf swing: Baseline and threshold
Silva, Luis; Marta, Sérgio; Vaz, João; Fernandes, Orlando; António, Maria; Pezarat-Correia, PedroThere is a lack of studies regarding EMG temporal analysis during dynamic and complex motor tasks, such as golf swing. The aim of this study is to analyze the EMG onset during the golf swing, by comparing two different threshold methods. Method A threshold was determined using the baseline activity recorded between two maximum voluntary contraction (MVC). Method B threshold was calculated using the mean EMG act...
Shoulder rotator isokinetic strength profile in young swimmers
Batalha, Nuno; Raimundo, Armando; Tomas-Carus, Pablo; Fernandes, Orlando; Marinho, Daniel; Silva, AntónioConsidering that some studies suggest that shoulder rotators muscle imbalances are related to joint pain and injury, and that there are no normative data for young swimmers, the aim of this study was: i) to describe the muscle balance, fatigue and isokinetic strength profile of the shoulder rotators in young swimmers; ii) to compare the results between swimmers and a group of young non-practitioners; iii) to co...
The profile of postural control in elderly through traditional methods
Furtado, Sofia; Raimundo, Armando; Fernandes, OrlandoThe objective of this study was evaluate and characterize the behavior of center-of-pressure (CoP) during postural control between a group of healthy elderly adults with structure physical activity and a group of healthy elderly adults without structure physical activity.Population: 75 healthy elderly (mean age 686 years, range 61-83), 23 Male ,52 female; non fallers, 40 elements are regular practitioners of a ...
A Sinistralidade Rodoviária: O Sistema Sancionatório em Portugal
Fernandes, Orlando MarquesAnálise e articulação das variáveis dos factores da sinistralidade rodoviária - Homem, Veículo, Via e Meio Ambiente - e do regime sancionatório, no período compreendido entre 1999 e 2008. Utiliza-se uma metodologia mista com recurso aos métodos hipotético-dedutivo, comparativo e a análise económica do Direito, com recorrência a estatísticas. Identificam-se as causas dos acidentes e os seus inte...
Construção e exploração de ontologias para a negociação automática em empresas ...
Fernandes, Orlando Daniel da Cunha RibasTese de mestrado. Inteligência Artificial e Sistemas Inteligentes. Faculdade de Engenharia. Universidade do Porto. 2007
Effects of whole-body vibration on thigh neuromuscular activity
Raimundo, Armando; Malta, João; Batalha, Nuno; Fernandes, Orlando; Tomas-Carus, PabloIntroduction The use of whole-body vibration (WBV) appears to influence in a positive way the performance of athletes in certain characteristics such as muscular strength, power and body balance. The aim of this study was to compare the acute neuromuscular activity caused by different vibration frequencies (15Hz and 25Hz), and different knee flexion angles (120° and 150°). Methods A total of 19 male university ...
Territorial gain dynamics regulates success in attacking sub-phases of team sports
Correia, Vanda; Araújo, Duarte; Fernandes, Orlando; Fonseca, Sofia; Davids, KeithBackground and objective: Field invasion games, such as rugby union, can be conceptualised as dynamic social systems in which the agents continuously interact to contest ball possession and territorial gain. Accordingly, this study aimed to identify the collective system dynamics of rugby union phases-of-play near the try line by investigating whether ball displacement trajectory on the playing field provides i...
The Ecological Dynamics of 1v1 Sub-Phases in Association Football
Duarte, Ricardo; Araújo, Duarte; Gazimba, Vítor; Fernandes, Orlando; Folgado, Hugo; Marmeleira, José; Davids, KeithThe purpose of this study was to analyze the informational constraints that influence the dynamics of 1v1 situations in football. Specifically, we analyzed the contribution of interpersonal distance and relative velocity to explain phase transitions that occurred between stable and unstable coordinative states in 1v1 in football. Participants were six, U13 level football players (Mean age: 11.8±0.4 yrs), who pe...
Water training effect in shoulder rotators strength in young swimmers
Batalha, Nuno; Tomás-Carús, Pablo; Raimundo, Armando; Fernandes, Orlando; Marinho, Daniel; Silva, AntónioINTRODUCTION The purpose of this study was to evaluate the effect of 18 weeks water training on the rotator cuff strength of young swimmers. METHODS Twenty Portuguese national level male swimmers (age: 14.60±0.67 years old, height: 170.79±6.48 cm, body mass: 61.73±4.68 kg) and 16 sedentary male students (age: 14.88±0.72 years, height: 168.38±6.19 cm, body mass: 60.84±11.69 kg) participated in this study. The pe...
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