Citation

Duarte R, Araújo D, Fernandes O, Fonseca C, Correia V, Gazimba V, Travassos B, Esteves P, Vilar L, Lopes J. Medicina (Lithuania) 2010; 46(6): 408-414.

Affiliation

Faculty of Human Kinetics, Technical University of Lisbon, Lisbon, Portugal. rduarte@fmh.utl.pt

Copyright

(Copyright © 2010, Lietuvos Gydytoju Sajunga Lithuania)

DOI

unavailable

PMID

20944449

Abstract

BACKGROUND AND OBJECTIVE: In the last years, several motion analysis methods have been developed without considering representative contexts for sports performance. The purpose of this paper was to explain and underscore a straightforward method to measure human behavior in these contexts. MATERIAL AND METHODS: Procedures combining manual video tracking (with TACTO device) and bidimensional reconstruction (through direct linear transformation) using a single camera were used in order to capture kinematic data required to compute collective variable(s) and control parameter(s). These procedures were applied to a 1vs1 association football [soccer] task as an illustrative subphase of team sports and will be presented in a tutorial fashion.

RESULTS: Preliminary analysis of distance and velocity data identified a collective variable (difference between the distance of the attacker and the defender to a target defensive area) and two nested control parameters (interpersonal distance and relative velocity).

CONCLUSIONS: Findings demonstrated that the complementary use of TACTO software and direct linear transformation permit to capture and reconstruct complex human actions in their context in a low dimensional space (information reduction).

Language: en