Ferrario et al. (1999) Morphological variation analysis of the repeatability of soccer offensive schemes

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Morphological variation analysis of the repeatability of soccer offensive schemes

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CONTRIBUTORS:

	Author:	Ferrario, V. F.
	Author:	Sforza, C.
	Author:	Dugnani, S.
	Author:	Michielon, G.
	Author:	Mauro, F.

JOURNAL:

Journal of Sports Sciences (JSS), 17(2), ?? - ??.

YEAR:

1999

PUB TYPE:

Journal Article

SUBJECT(S):

SOCCER; OFFENCE; STATISTICS; VARIANCE; MORPHOLOGY; EVALUATION; COMPARATIVE-STUDY

DISCIPLINE:

No discipline assigned

HTTP:

LANGUAGE:

English

PUB ID:

103-366-653 (Last edited on 2002/02/27 18:44:59 US/Mountain)

SPONSOR(S):

ABSTRACT:
A landmark-based statistical method, morphological variation analysis, for the quantification of the repeatability in the arrangement of body segments during the execution of sport actions has recently been developed. A two-dimensional shape is produced and its morphology is studied. The method was used to measure the within-team variability of the relative positions of players during the execution of offensive schemes in soccer. Two junior soccer teams of different technical abilities (semi-professional vs amateur), each playing two standardized offensive schemes of different difficulty (easier: throw-in; more difficult: wing attack) were filmed. Each scheme was repeated 25 (semi-professionals) or 10 (amateurs) times. For each repetition, the position of the players in a single significant frame was analysed using morphological variation analysis. The reproducibility of both schemes was higher among the semi-professionals than among the amateurs (two-way analysis of variance, P less than 0.005). The repeatability of the players' relative positions was related to the difficulty of the scheme and the technical level of the team. Among the amateurs, the throw-in was more reproducible than the wing attack (Student's t-test, P less than 0.005). The method not only allows the quantification of collective (team) coordination, but also the separation of the influence of individual players.

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