Effects of Plyometric Training on Some Neural Adaptations and Performance of Young Soccer Players
Message:
Abstract:
The purpose of this study was to determine neural adaptations role after short-term plyometric training within soccer practice, in young soccer players. 15 young soccer players (age 14.26 years, weight 40.42 kg, height 153,56, body fat 7.64%) were randomly assigned to training (plyometric and soccer skills training) group (n=8) and control (soccer skills training) group (n=7) that performed 6 weeks training (16 seasons). To assess neural adaptations surface EMG was done on vastus lateralis and vastus medialis muscles, pre and post training program. Hoffmann reflex was also evaluated in soleus muscle. At baseline and after training, performances of players were assessed with the tests: 5-meter sprint, 10-meter sprint, agility test, counter movment jump (CMJ), Bosco5 and 15 seconds. Two way repeated measure ANOVA (2×2, time×group) was used to identify any significant differences and p ≤ 0.05was accepted. As expected, the results show plyometric training was associated with significant decreases in 5-meter sprint (% 5.97), 10-meter sprint (%-4.05) and agility (%-8.99) and significant increases in SEMG vastus lateralis (%36.54), jump height for CMJ (%12.95), Bosco 5 seconds (%14.08) and Bosco 15 seconds (%13.84) that demonstrated the effectiveness of plyometric training. Control group showed only a significant decrease in agility (%-4.72). However, in two groups H-reflex did not show significant variation. Therefore, according to these results it seems that performance adaptations which achieved in result of short-term plyometric training have possibly a neural origin which may be attributable to increased motor unit recruitment and/or faster firing rates, but motor reflex does not seem to play any role in these adaptations. The position of this study is to advise the application of plyometric trainings combined with soccer training rather than soccer training alone to improve the explosive functions of young soccer players.
Language:
Persian
Published:
Olympic quarterly, Volume:20 Issue: 3, 2013
Page:
31
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