Autor(es): Ferraz, Ricardo Manuel Pires
Data: 2016
Identificador Persistente: http://hdl.handle.net/10400.6/4361
Origem: uBibliorum
Projeto/bolsa: info:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBD%2F71470%2F2010/PT;
Assunto(s): Desporto - Aspectos psicofisiológicos; Futebol - Treino - Aspectos psicofisiológicos; Futebol - Fadiga - Aspectos psicofisiológicos; Domínio/Área Científica::Ciências Sociais::Outras Ciências Sociais
Interest in the topic of fatigue in sports science has a long history and recent research and theories have highlighted the problem of fatigue more broadly. A new perspective seems to have emerged supported by the concept of the brain acting as a central master regulator of exercise performance. This kind of regulation is named “pacing” and nowadays is assumed as an important concept in sport and exercise, supporting this psychophysiological perspective. Having prior knowledge about the activity is a central point on this view of pacing, based on the principle that athletes are then able to self-regulate their own performance through the entirety of the exercise. However, the precise importance of the psychophysiological perspective in context of training (exercises) or competition remains unclear, especially in team sports as a soccer. The general aim of this thesis was to analyze the effects of fatigue and task knowledge duration on kicking performance and pacing strategies in soccer. For the accomplishment of these purposes the following sequence was used: (i) reviewing the available literature; (ii) demonstrating the effects of fatigue on kicking ball velocity in soccer players; (iii) investigating the influence of fatigue upon kicking performance of soccer players and examining the effect of the knowledge of the exercise duration upon these two parameters; (iv) investigating the influence of different exercise intensities on kicking accuracy and velocity in soccer players and analyzing the player pacing strategies from different prescribed intensities; (v) investigating the possible influence of knowledge of exercise duration on player pacing strategies during soccer small-sided games (5 vs 5). The main conclusions drawn were (i) there is potential negative fatigue effect induced by high intensity exercises on kicked-ball velocities in soccer; (ii) the effect of fatigue can be variable; (iii) kicking accuracy is not affected by fatigue considering the accuracy as a secondary aim in relation with kicking velocity; (iv) no effects of knowledge of the exercise duration were found on kicking performance, but in respect of pacing strategies during soccer small-sided games, the findings showed its relevance. In addition, the results support the hypothesis about the involvement of psychophysiological factors and they express the complexity of the fatigue phenomenon and the relevance of the theory of central master regulation of the brain on exercise performance.
