Effects of Shoulder Complex Muscles Fatigue in Hand’s Fine and Gross Skills in Volleyball Players

Numerous studies have been conducted on muscular fatigue and its impact on balance movements, but limited information is available on tiredness and fine motor skills. Therefore, the current study was carried out to investigate the effect of shoulder muscle fatigue on fine (pencil drawing) and gross (paw pass) skills of professional volleyball players.
A total of 31 skilled volleyball players (16 girls and 15 boys) were selected using available sampling method. Research variables were evaluated before and after fatigue. Independent and dependent t-test were used to analyze the data in SPSS. The significance level was set at p <0.05.
The results showed that speed and pressure of hand was reduced in girls after fatigue (p <0.05), while it increased the hands speed in boys. Variability of hand performance in both groups did not changed significantly after fatigue (p >0.05). The speed and precision of volleyball overhand pass was similar before and after fatigue.
According to the results, the fatigue of the shoulder complex muscle decreased the performance in the fine skills of the fingers of girls, but it did not affect the performance of the two groups regarding the hand gross skills.