Motor Behavior

Effect of Task Constraints on Coordination Variability in Missed and Successful Trails of Chip Pass

Document Type : Research Paper

Authors

1 Ph.D. of Motor Control, University of Tehran

2 Associate Professor. of Motor Behaviour and Sport Psychology, University of Tehran

3 Assistance Professor of Motor Behaviour, University of Tehran

4 Associate Professor of Motor Behaviour and Sport PsychologyUniversity of Tehran

5 Assistant Professor of Health and Sports Medicine, University of Tehran

Abstract
Variability is discussable topic in skilled execution, therefore; the aim of the present study was to investigate coordination variability between missed and successful chip pass skill between expert soccer players under variation of the task constraints. Participants included 10 right-footed soccer men in the age 22.06 ± 1.41 years’ old. They performed 10 passing soccer chips in different height of the barrier and various distances of ball to barrier and target (task constraints). Waterloo Footedness Questionnaire was used to determine of dominant foot and a 7-point Likert scale was used to evaluation of performance accuracy. Vector coding method was used to measure of motor coordination variability for recorded kinematic data form joints of the ankle, knee and hip of the kicking foot. All variables were found to be normally distributed (Shapiro Wilks > 0.05). Analysis of variance with repeated measures was used to compare kinematic data between missed and successful trails (P≤0.05). Results showed that significant difference exist in the ankle-knee couplings between missed and successful trails in the first (Ball distance to target 10 meters and the height of barrier 1.5 m) and second (Ball distance to target 12 meters and the height of barrier 1.7 m) statuses (P= 0.01). While in the hip-knee couplings no significant difference exists between missed and successful trails in the first and second statuses (P= 0.61), (P= 0.36). The results indicate that probably skilled in their successful trails are capable to benefit of inherent variability of the system functionally for optimal organization of the task constraints and improve motor performance.

Keywords

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Motor Behavior
Volume 11, Issue 38
Winter 2020
January 2020
Pages 97-114

  • Receive Date 09 September 2017
  • Revise Date 16 December 2017
  • Accept Date 09 January 2018

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