Physical and motor tests to estimate the improvement of the float serve

The aim of the study was to analyze and evaluate the differences in jumping ability and in the fundamental technical of the float serve in volleyball, in order to evaluate the effectiveness of a working method. The study was performed on a sample of 11 male volleyball players (Under 20). Data were collected in two periods (September and October), subjecting the players to intensive technical and physical work. At the beginning of the training period, anthropometric data were collected, such as mean and standard deviation, and jumping ability. Players made a series of float serve to a specific area of the opponent's field and incremental effects were estimated after the intensive training period (in October). The statistical analysis of the data provided for the estimation of the percentage data and a Test t student to verify the difference between pre and post workout. The significant difference was set with p <0.05. The results show, after four weeks of intensive training, an improvement in jumping ability, at the Vertec test, equal to 3.45cm and a significant difference with p = 0.001, between the two series of jumps; while the estimate of the effect of technical training (float service) was 22%. These physical and motor tests allow the training process to be monitored by estimating the effects induced, allowing the coaches to design and adequately choose the methodology and the training load for an effective performance