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Background and purpose: Shoulder injuries are very common among the volleyball players. Functional disability of shoulder is one the most important reasons of the players' absence in match and training sessions. The purpose of the present study was to investigate the prevalence of shoulder pain and functional disability among the Iranian premier league volleyball players and also to determine the correlation between pain prevalence and functional disability with some factors such as age, gender, body type and the activity of these players. Materials and methods: Following ethical approval from the University of Social Welfare and Rehabilitation Science, a cross-sectional study was carried on 103 male (Mean height 190.69 ± 8.77 cm, mean weight 84.60 ± 10.4 Kg and mean age 23.21 ± 3.80 years old) and female (mean height 170.94 ± 4.72 cm, mean weight 61.42 ± 6.58 Kg and mean age 24.02 ± 7.63 years old) volleyball players from the Iranian Volleyball Premiere league. A structured questionnaire including questions on demographic and sports characteristics, and also prevalence and risk factors of shoulder pain was used. Visual analogue scale and disability of arm, shoulder and hand questionnaires were used to determine the pain intensity and functional disability. Chi-Square (χ2), Pearson Correlation Coefficient and Logistic Regression analyses were applied to investigate the correlation among variables and to assess the existence linear relationship between variables. Also, an Independent-Samples T-Test was used to identify the differences among these variables. Statistical analysis was performed using SPSS (Version 18) and the level of significance was set up at 0.05. Results: The results indicate that 22% of the samples reported pain at the time of completing questionnaire (point prevalence) 29% during last six months 36% during last year and 38% suffered during their lifetime. Almost 70% of volleyball players reported a level of functional disability with the average DASH score of 12.7 ± 9.2. No significant difference was found in pain intensity and functional disability of shoulder between male and female volleyball players (P>0.05 in both instances). The results indicated a significant correlation between the pain prevalence and body mass index, Level of sport, number of training days per week, number of training sessions per week and number of training sessions per day (P<0.05 in all instances). Conclusion: The prevalence of shoulder pain and functional shoulder disability among Iranian premier league volleyball players seem to be high. Considering identified risk factors, further studies focusing on preventive strategies are recommended to prevent shoulder injuries among the Iranian volleyball players.

Keywords: Volleyball, epidemiology, pain, functional disability, shoulder

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