SportLogia
Vol. 8, Issue 1, June 2012.
INFLUENCE OF TASK CONSTRAINTS ON ATTACKER
TRAJECTORIES DURING 1V1 SUB-PHASES IN SOCCER PRACTICE
Filipe Clemente1, Micael Couceiro2, Fernando Martins3,4, Gonçalo Dias1, and Rui Mendes4,5
1RoboCorp, Faculty of Sport Sciences and Physical Education – University of Coimbra, Portugal
2RoboCorp, Engineering Institute of Coimbra – Polytechnic Institute of Coimbra, Portugal
3Instituto de Telecomunicações, Covilhã, Portugal
4RoboCorp, Coimbra College of Education – Polytechnic Institute of Coimbra, Portugal
5Interdisciplinary Centre for the Study of Human Performance – Lisbon Technical University, Portugal
ORIGINAL SCIENTIFIC PAPER
doi: 10.5550/sgia.120801.en.013C
COBISS.BH-ID: 2934040
UDK: 796.332.093.1
Summary
The task constraints are prevalent elements used by coaches to train their players in sports training (Araújo, 2006; Newel, 1986). The scope of this study focuses on the analysis of spatial occupation of the attacking player in the practice space, when subjected to certain instructional constraints, on 1v1 soccer sub-phase. This study analyzed 11 soccer players (17.91 ± 1.04 years old) with 8.60 ± 1.52 years of practice. The heat maps presented differences on the occupied field surface in the various practice conditions. The analysis of variance of the duration of the offensive attempt also presented statistical differences within the various practice conditions (F(2, 327) = 30.776;
p = .001). Results suggest that in risk situations the attacker tends to promote the space-time symmetry. On the other hand, when the instruction to keep the ball was given, unlike the risk constraint, there was a lateralization of the action, increasing the variability and dispersion of the attacker’s trajectories. This study demonstrated the relevance of manipulating instructional constraints.
Key words: Task Constraints, instruction, soccer, spatial occupation, heat maps.
References
Akritas, M. G., & Papadatos, N. (2004). Heteroscedastioc One-Way ANOVA and Lack-of-Fit Tests. Journal of the American Statistical Association, 99(466), 368−390. doi: 10.1198/016214504000000412 
Araújo, D. (2006). Tomada de Decisão no Desporto ŠDecision-making in Sport]. Cruz Quebrada, Portugal: FMH Edições.
Araújo, D., Davids, K., Bennett, S.J., Button, C., & Chapman, G. (2004). Emergence of sport skills under constraint. In A. M. Williams and N. J. Hodges (Eds.), Skill Acquisition in Sport: Research, Theory and Practice (pp. 409−433). London, UK: Routledge, Taylor & Francis.
Clemente, F., Couceiro, M., Martins, F. M. L., & Mendes, R. (2012a). The usefulness of small-sided games on soccer training. Journal of Physical Education and Sport, 12(1), 93−102.
Clemente, F., Couceiro, M., Martins, F. M. L., & Mendes, R. (2012b). Team’s Performance on FIFA World Cup 2011: Study based on Notational Analysis. Journal of Physical Education and Sport, 12(1), 13−17.
Clemente, F., & Mendes, R. (2011a). Aprender o jogo jogando: uma abordagem transdisciplinar ŠLearning the game through the playing: A multidisciplinary approach]. Revista Científica Exedra, 5(1), 27−36.
Clemente, F., & Mendes, R. (2011b). Constrangimentos instrucionais em futebolistas sub-12 na sub-fase de jogo 1 x 1 com guarda-redes ŠInstructional Constraints in U-12 soccer players at the 1 v 1 sub-phase with goalkeeper]. In P. Mouroço, O. Vasconcelos, J. Barreiros, and R. Matos (Eds.), Estudos em Desenvolvimento Motor da Criança IV (pp. 146−152). Leiria, Portugal: ESECS/IPL.
Clemente F, Mendes, R., & Soler, F. C. (2011). Constrangimentos instrucionais em futebolistas sub-18 na sub-fase de jogo 1x1 com guarda-redes ŠInstructional Constraints in U-18 soccer players at the 1 v 1 sub-phase with goalkeeper]. Revista Portuguesa de Ciências do Desporto, 11, supl. 4, 45.
Davids, K., & Araújo, D. (2005). A abordagem baseada nos constrangimentos para o treino desportivo ŠThe Constraints-led Approach in Sport Training]. In D. Araújo (Ed.), O Contexto da Decisão – A acção táctica no desporto (pp. 35−60). Lisboa: Visão e Contextos, Lda.
Davids, K., Button, C., & Bennett, S. (2008).
Dynamics of Skill Acquisition: A Constraints-Led Approach. Champaign, IL: Human Kinetics.
Duarte, R., Araújo, D., Fernandes, O., Fonseca, C., Correia, V., Gazimba, ... Lopes, J. (2010a). Capturing complex human behaviors in representative sports contexts with a single camera.
Medicina (Kaunas), 46(6), 408−414. doi: 10.2174/1875399X01003010016 
Duarte, R., Araújo, D., Gazimba, V., Fernandes, O., Folgado, H., Marmeleira, J., & Davids, K. (2010b). The Ecological Dynamics of 1v1 Sub-Phases in Association Soccer. The Open Sports Sciences Journal, 3, 16−18.
Figueira, F. M., & Greco, P. J. (2008). Futebol: um estudo sobre a capacidade táctica no processo de ensino-aprendizagem-treinamento ŠSoccer: Study about the tactical knowledge in the teaching-learning-training process]. Revista Brasileira de Futebol, 1(2), 53−65.
Handford, C., Davids, K., Bennett, S, & Button, C. (1997). Skill acquisition in sport: Some applications of an evolving practice ecology. Journal of Sport Sciences, 15(6), 621−640. doi: 10.1080/026404197367056 
; PMid: 9486439
Laureano, R. M. (2011). Teste de Hipóteses com o SPSS. O meu manual de consulta rápida ŠHypothesis’ tests in SPSS. My manual for quick consultation]. Lisboa, Portugal: Edições Sílabo.
Maroco, J., & Bispo, R. (2003). Estatística Aplicada às Ciências Sociais e Humanas ŠApplied Statistics at the Social and Human Sciences]. Lisboa, Portugal: Climepsi Editores.
Maroco, J. (2010). Análise Estatística com o PASW Statistics ŠStatistical Analysis with PASW Statistics]. Lisboa, Portugal: Edições Sílabo.
McGarry, T., Anderson, D., Wallace, S., Hughes, M., & Franks, I. (2002). Sport competition as a dynamical self-organizing system. Journal of Sports Sciences, 20, 771−781. doi: 10.1080/026404102320675620 
; PMid: 12363294
Newell, K. M. (1986). Constraints on the development of coordination. In M. G. Wade & H. T. A. Whiting (Eds.), Motor Development in Children: Aspects of Coordination and Control (pp. 341−360). Dordrecht, Netherlands: Martinus Nijhoff.
Passos P., Araújo, D., Davids, K., Gouveia, L., Milho, J., & Serpa, S. (2008). Information-governing dynamics of attacker-defender interactions in youth rugby union. Journal of Sports Sciences, 16(13), 1421−1429.
Passos, P, Lopes, R., & Milho, J. (2008). Análise de padrões de coordenação interpessoal no um-contra-um no Futebol ŠPattern Analysis of the Interpersonal Coordination in Soccer 1-a-side]. Revista Portuguesa de Ciência do Desporto, 8(3),
365−376. doi: 10.1080/02640410802208986 
; PMid: 18923958
Pedrosa, A. C., & Gama, S. M. A. (2004). Introdução computacional à probabilidade e estatística ŠIntroduction Computational Probability and Statistics]. Porto, Portugal: Porto Editora.
Pestana, M. H., & Gageiro, J. N. (2008). Análise de dados para as ciências sociais: A complementaridade do SPSS ŠData Analysis for the Social Sciences: The complamentarity of the SPSS] (5th edition). Lisboa, Portugal: Edições Sílabo.
Travassos, B., Araújo, D, Correia, V., & Esteves, P. (2010). Eco-Dynamics Approach to the study of Team Sports Performance. The Open Sports Sciences Journal, 3, 56−57. doi: 10.2174/1875399X01003010056 
Vincent, W. J. (1999). Statistics in Kinesiology (2nd Edition). Champaign, IL: Human Kinetics.
