The effect of strength training on service speed of 11-13 age volleyball players

Research objective: The purpose of this study is to analyse the effect of serve speed on eight-week strength training of 11-13 age volleyball players. Material and Methods: A total of 24 athletes between the ages of 11-13 participated in the study. The subjects were divided into two groups as 12 experiment (X age = 12,41; BMI=20,2 kg/m2 and 12 control (Xage = 12,58; BMI=20,9 kg/m2) groups. The 12 volleyball players in the experimental group have done strength training program 2 days a week for 8 weeks, additionally to their volleyball training While 12 volleyball players in the control group continued their routine volleyball training. In two groups, pre-test and post-test data were recorded as a serve speed test. Findings: According to the results of the dependent sample T-test, where we compared the experimental group pre-test and post-test results, there was an average increase of 6.33 between the pre-test and the post-test. This difference was statistically significant (p<0,05). According to the results of the dependent sample T-test, in which we compared the pre-test and post-test results of the control group, there was an average increase of 0.58 between the pre-test and the post-test. This difference was not statistically significant. According to the results of the independent sample T-test, where we compared the development differences between the pre-test and post-test of the experimental group and the control group, the difference between the development in the experimental group and the development levels in the control group was found to be statistically significant (p <0.05). Conclusions: As a result, it is seen that the strength training group has a positive effect and increases the service speed effect compared to the volleyball players who were not included in the strength training (p<0,05). Key words: Volleyball, Serve speed, Strength Training, Female child