Effects of a structured physical training program on reaction time in U15 volleyball players

Volleyball is a high-intensity sport characterized by repeated jumps, sudden changes of direction, and rapid transitions between offensive and defensive phases. In such a dynamic context, reaction time becomes a decisive factor of performance, directly influencing the efficiency of technical and tactical actions and the players’ ability to adapt to the unpredictability of the game.

The purpose of this study was to analyze changes in reaction time in U15 volleyball players following the implementation of a specific physical training program based on the principles of microperiodization.

The sample consisted of 22 athletes, evaluated in two distinct stages: initial testing (February 2025) and final testing (September 2025). Between the two assessments, the participants followed a structured training program focused on developing speed ability and reaction time. Reaction time was measured using the Witty system under standardized conditions, with each athlete being evaluated individually.

Statistical analysis revealed significant differences between the two testing sessions, confirming the effectiveness of the implemented training program. The results show that a microperiodized training program, applied in the medium term, can generate measurable motor adaptations, contributing to the optimization of reaction speed in juvenile volleyball players.

These findings support the importance of integrating specific exercises aimed at developing reaction time into the training methodology and provide a basis for developing training models adapted to age and performance level.