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Abstract

Service is fundamental of the volleyball that can be trained under the same match conditions, as there is no interference of the defense. It is a fundamental that theoretically has the highest degree of efficiency, so it is useful to know which specific training method allows the best possible performance. The aim of the present study is to evaluate the difference in yields (results) on service, through the intensive and extensive training method.The method is experimental and the study was conducted on a sample of 20 males (12-14 years) divided into two experimental groups of 10 young athletes each. To them it was assignedthe motor task of performing the service from highfrom the regular position at bottom of the field. Participants were initiated at learn the new motor task, using two different training methods: intensive method with the same number of services in a period of 2 days a week and extensive method with the same number of services in a period of dual time of four days. Each group done 2400 services at week for four weeks. Group A has conducted training on four days consecutive weekly, while Group B on two days consecutive weekly. They have been collected data on the services realized individual and of group (each service dropped in the opponent's defense zone was assigned a point).The result for Group A (extensive training) resulted in an increase the performance by 10.43%. The result for Group B (intensive training) resulted in an increase the performance lower than Group A and was 6.13.The final percentage difference between the two groups has been 4.30%. After the first week, the results show the absence of significant differences between the two groups p-value = 0.127 (p> 0.05); instead, after four weeks, the results show a significant difference between the two groups p-value = 0.001 (p <0.05), in favor of group A.Finally, from results apparead that extensive practice, in the realization of effective and consolidated motor learning, must be based on careful time distribution of the exercises and with a high number of repetitions in order to obtain high precision and an elevated stability of the performance.

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