| The effect of volleyball specific fatigue on balance, proprioception and performance of volleyball players with high and low risk of anterior cruciate ligament injury |
| Paper ID : 1082-SSRC-13TH (R1) |
| Authors |
|
Hamid Alizadeh * urmia university , urmia , iran |
| Abstract |
| Background and Aim: The aim of this study was to investigate the effect of volleyball specific fatigue on balance, proprioception and performance of volleyball players with high and low risk of anterior cruciate ligament injury. Materials and Methods: 40 volleyball players from Urmia were selected in two groups with low risk of anterior cruciate ligament injury (Number: 20 people, age: 20.40 ± 1.60 years, height: 1.80 ± 0.04 m, weight: 72.70 ± 4.73 kg, BMI: 22.21 ± 0.80 Kg/m2, sports history: 5.85 ± 1.26 years, LESS score: 3.85 ± 0.58) with high risk of anterior cruciate ligament injury (Number: 20 people, age: 21.15 ± 1.87 years, height: 1.82 ± 0.06 m, weight: 75.20 ± 5.06 kg, BMI: 22.66 ± 1.08 Kg/m2, sports history: 6.55 ± 2.23 years, LESS score: 7.20 ± 0.69). After selecting the subjects with the help of LESS test (score below 6 indicates low risk and score above 6 indicates high risk), static balance with stork test, dynamic balance with Y test, knee proprioception with goniometer and performance with Sargent jump test was evaluated. After that, the special volleyball fatigue protocol was used to create fatigue and after the fatigue, the tests were evaluated again. The natural distribution of data was investigated by Shapiro-Wilk test. Then, correlated t-test and analysis of covariance under normal conditions and Wilcoxon and U-Mann-Whitney tests under abnormal conditions were used to evaluate the effect of fatigue and differences between groups. Data were analyzed by SPSS software version 24. Results: The results showed that fatigue had a significant effect on reducing static balance (P=0.001, P=0.001), total dynamic equilibrium score (P=0.001, P=0.001), proprioception (P=0.001, P=0.001) and performance (P=0.001, P=0.001) are affected. The results also showed a significant difference between the groups in all variables (P<0.05) except proprioception (P>0.05). Conclusion: In general, the results of the present study showed that fatigue was an important factor in reducing balance, proprioception and explosive power and this difference can be attributed to the underlying neuromuscular weakness in the high-risk group of injury. |
| Keywords |
| Fatigue, Balance, Proprioception, Performance, Injury, Volleyball |
| Status: Abstract Accepted (Poster Presentation) |
