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Center-Of-Pressure displacements of professional soccer players with the history of anterior cruciate ligaments reconstruction after soccer specific fatigue protocol (SAFT 90)
Poster Presentation
Paper ID : 1830-11THCONF
Authors
1university of guilan
2Department of physical education and sport sciences, university of guilan, rasht, iran
3Department of Physical Education and Sport Sciences, University of Guilan, Rasht, Iran
Abstract
Introduction: According to the high prevalence of noncontact ACL injuries in soccer sport and the role of postural stability in preventing sports injury as well as the occurrence of this injury in the final minutes of the match, it seems that fatigue and weakness of postural stability are among the causes of this injury. The aim of the study was to investigate the Center-of-pressure (COP) displacements of professional soccer players with the history of anterior cruciate ligament reconstruction (ACLR) after soccer specific fatigue protocol (SAFT 90).
Methodology: 22 professional soccer players, 12 healthy soccer players ( age 21.42 ± 2.05 years, height 174.91 ± 5.035 cm and weight 70.7 ± 5.27 kg) and 10 ACL-reconstructed soccer players (age 21.90 ± 3.28 years, height 175.8 ± 5.49 cm and weight 71.42 ± 5.49 kg) participated in this study. Participations performed jump-landing task pre, mid and after fatigue protocol (SAFT 90) on force plate. For the statistical analysis repeated measures ANOVA and independent T test were used (p< 0.05).
Results: The COP displacements in healthy group in med-lat and ant-post directions (P=0.001) and in ant-post directions in ACLR group (P=0.025) showed significant difference in different times. The COP displacements just in ant-post direction between healthy and ACLR group had significant difference (P=0.001).
Discussion: After 90 minutes stimulated soccer activity, the ability of players to control stability during landing decreased. Therefore, it seems that the increase of COP displacements in ACLR group in ant-post direction more than healthy group cause of two reasons; decrease of muscle contraction ability and remaining defects of ACL rupture, such as proprioception and sensorimotor defects.
Methodology: 22 professional soccer players, 12 healthy soccer players ( age 21.42 ± 2.05 years, height 174.91 ± 5.035 cm and weight 70.7 ± 5.27 kg) and 10 ACL-reconstructed soccer players (age 21.90 ± 3.28 years, height 175.8 ± 5.49 cm and weight 71.42 ± 5.49 kg) participated in this study. Participations performed jump-landing task pre, mid and after fatigue protocol (SAFT 90) on force plate. For the statistical analysis repeated measures ANOVA and independent T test were used (p< 0.05).
Results: The COP displacements in healthy group in med-lat and ant-post directions (P=0.001) and in ant-post directions in ACLR group (P=0.025) showed significant difference in different times. The COP displacements just in ant-post direction between healthy and ACLR group had significant difference (P=0.001).
Discussion: After 90 minutes stimulated soccer activity, the ability of players to control stability during landing decreased. Therefore, it seems that the increase of COP displacements in ACLR group in ant-post direction more than healthy group cause of two reasons; decrease of muscle contraction ability and remaining defects of ACL rupture, such as proprioception and sensorimotor defects.
Keywords
COP displacement; Soccer specific fatigue protocol (SAFT 90); Professional soccer player; ACL reconstructed
Subjects