| Summary: | In the last decades, exercises with the use of tubes (round) or elastic bands (flat) of progressive resistance have been incorporated into the training programs, being a fundamental tool to develop muscle strength and imitate sport movements or gestures in numerous sports specialties, because of its ease to be used. The objective of this study was to design a training program with elastic resistance bands for the increase of the speed in the home-first base race with junior baseball players from Matanzas who participated in the XLVI National Baseball Championship. The experimental stage is developed during the preparatory period, which had a duration of 20 micro cycles, with a frequency of three days per week, using the combination of speed exercises with bands or elastic tubes and the models of periodization of strength and the System of Block or Concentrated Strength. The results show significant changes in the times of the home-first base race of the players in the different controls carried out with a 95% of confidence, since the value of the probability (p-value=0.0001) is less than 0.05. In addition, a 4.37 % increase was achieved with a reduction of 0.37 seconds.
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