“Na Desportiva do Fundão aplico conhecimentos com origem em investigações na UBI”

Bruno Travassos, docente da UBI, assumiu o comando da equipa fundanense que disputa a 1ª Divisão Nacional de Futsal. Em entrevista, fala do desafio e da formação de atletas na região.

– See more at: http://www.urbi.ubi.pt/pag/13160

Dynamics of players’ relative positioning during baseline rallies in tennis

Abstract: This study analysed how the relative positioning of players on court influenced patterns of interpersonal coordination in baseline rallies in tennis. We developed a model (PA index) that assigns a weight to the position of each player on court and determines a positional advantage, based on the relative proportionality between the lateral and longitudinal displacement
values during rallies. To test the model, data from 27 randomly-selected baseline rallies from three ATP World Tour matches (professional tennis players’ tournaments organized by Association of Tennis Professionals) on clay were analysed. Results revealed that the PA index of players on court described their interpersonal coordination dynamics during baseline
rallies. It also identified the emergence of rally breaks in the interpersonal coordination patterns of competing dyads that led to a point being scored. Data suggest that positional advantage data may assist coaches in the design of training tasks to enhance players’ court coverage and performance during competitive interactions, acting as a valuable tool for performance
analysis in tennis.

Performance analysis in team sports: Advances from an Ecological Dynamics approach

Abstract: Capacity to produce data for performance analysis in sports has been
enhanced in the last decade with substantial technological advances.
However, current performance analysis methods have been criticised for
the lack of a viable theoretical framework to assist on the development of
fundamental principles that regulate performance achievement. Our aim
in this paper is to discuss ecological dynamics as an explanatory
framework for improving analysis and understanding of competitive
performance behaviours. We argue that integration of ideas from
ecological dynamics into previous approaches to performance analysis
advances current understanding of how sport performance emerges from
continuous interactions between individual players and teams. Exemplar
data from previous studies in association football are presented to
illustrate this novel perspective on performance analysis. Limitations of
current ecological dynamics research and challenges for future research
are discussed in order to improve the meaningfulness of information
presented to coaches and managers.

Tactical performance changes with equal vs unequal numbers of players in small-sided football games

Abstract: This study investigated the effects of equal (GK+4-vs-4+GK) and unequal
(GK+4-vs-3+GK) numbers of outfield players on tactical behaviour of
players and teams in small-sided football games. Thirty sequences of play
without transitions in ball possession captured from six games of five
minutes duration were selected for analysis from each game condition.
The movement trajectories of players, teams and ball were expressed using
polar coordinates referenced on centre location of the defending goal.
Tactical performance was expressed by the degree of coupling of players
and teams as indicated by the relative phase for different dyad
combinations and by spatial-temporal relations between players and teams
using various kinematic metrics. Results showed stronger couplings in the
defending dyads, defending player ball pairs and the defending team and
ball (p < 0.05) for the unequal numbers game condition. Also, decreased
distances between players to their team geometric centre, decreased
surface areas but increased distances between team geometric centres was
observed for unequal playing numbers (p<0.05). Thus, results
demonstrated that numerical advantage for the attacking team changed
the tactical performances of the defending and attacking players and
teams, particularly the former. Knowledge on this matter provides support
for coaches manipulating small-sided football games for training
purposes.