Document Type : Original Articles

Authors

• Hamed Malekzadeh ¹
• Foad Seydi ²
• Reza Rajabi ³

¹ MSc Student, Department of Sport Injuries and Corrective Exercises, School of Physical Education and Sport Sciences, University of Tehran, Tehran, Iran

² Assistant Professor, Department of Sports Medicine and Health, School of Physical Education and Sport Sciences, University of Tehran, Tehran, Iran

³ Professor, Department of Sports Medicine and Health, School of Physical Education and Sport Sciences, University of Tehran, Tehran, Iran

Abstract

Introduction: Proprioceptive dysfunction may increase the risk of injury in athletes. Several studies have examined factors influencing Proprioceptive acuity; however, the impact of different hours of the day on performance of this sense is unknown. The purpose of this study was to evaluate the effect of circadian rhythm on the accuracy of the knee JPS in men's college soccer players.Materials and Methods: 30 male college soccer players with an average age of 23.14 ± 1.27 years, height 176.20 ± 5.96 cm and weight 69.94 ± 7.18 based on inclusion and exclusion criteria of the study were selected as subjects. Reconstruction error data at three different times: 10, 15 and 20 and at an angle of 45° and 60° flexion using skin markering and Digital Imaging were collected. Auto CAD software is used to Analyzing images and for comparing data variances in different times repeated measures ANOVA has been used.Results: Despite the different push at different times and also decreasing in reconstruction errors out during the intermediate hours of day, there was no statistically significant difference in knee angular reconstruction error in different times.Conclusion: According to the results of this study, it appears that the accuracy of Proprioceptive function of the knee joint is not affected by circadian rhythm and then, there are no differences in the risk of injury in athletes due to Proprioceptive dysfunction while performing physical activities in different hours of day and night.

Keywords

• Proprioception
• Circadian Rhythm
• Knee
• Joint angular reconstruction