Background: The aim of this study was to compare the psychological parameters in Coper individuals and people with chronic ankle instability (CAI).Methods: This study was a cross-sectional and comparative study. Sixty elite athletes, from multiple athletic disciplines, who have suffered from lateral ankle sprains at least once in the last two years, were selected as research subjects and were divided into two groups: Copers (n = 30) and CAI (n = 30). Classification of CAI, and coper groups were done by AJFAT, CAIT and FAAM self-report questionnaires. Athletes' psychological characteristics were measured using the Ottawa Mental Skills Assessment Tool (OMSAT-3). Multivariate analysis of variance (MANOVA) and independent t-test were used to evaluate the differences between groups at a significance level of 0.05. Results: The results showed there was a significant difference between the two groups in Goal setting, Self-confidence, Commitment, Relaxation, Fear control and Coping with stress, Focusing, Refocusing, and Mental practice (P <0.05). And Coper athletes scored higher than ankle instability athletes. But there were no significant differences between the two groups in the following parameters: Inactivation, Imagery, and Competition planning skills (P <0.05).Conclusion: The findings showed that athletes with CAI scored lower than Coper athletes on psychological exams. Given the importance of prioritizing the mental components of goal setting, imagery, relaxation, activation, and self-confidence, the design of the competition should be a priority for rehabilitation. Therefore, coaches and sports experts are recommended to focus and improve mental skills in athletes who suffer from sports injuries, to reduce the occurrence of repetitive sports injuries.

Background and purpose. Considering the importance of the effect of scapular dyskinesia on movement patterns and performance in swimmers, it conducted this study to investigate shoulder function in swimmers with and without scapular dyskinesia. Materials and methods. The present study was cross-sectional and included sixty professional male swimmers between 18 and 30 years old with and without scapular dyskinesia. McClure's test was used to identify people with scapular dyskinesia. It took a caliber test to measure the brachial scapular rhythm. SPSS 23 software was used for analysis. Independent t-test was used to examine the difference between groups at a significance level of 0.05. Results. The results showed a significant difference between the feeling of shoulder joint position at 45 and 135-degree angles in swimmers with and without scapular dyskinesia (p < 0.05). There is a significant difference between the functional stability of the upper limbs of swimmers with and without scapular dyskinesia (p < 0.05). Also, there is a significant difference between the perception of shoulder joint strength of swimmers with and without scapular dyskinesia (p < 0.05). Conclusions. Identifying the effects of dyskinesia on the sense of shoulder joint position, functional stability, and sense of force perception as one of the risk factors and as a target point for prevention and preventing the risk of chronic injuries in these people.