This article aims to illustrate an innovative and absolutely functional method of assessing the fitness of a tennis player, based on the registration of an incremental metabolic effort, under attentive aegis.

This study is aimed at analyzing young tennis players through an evaluation of the simple reaction times (RTsS) and complex reaction times (RTsC) using the SensoBuzz console, equipped with a chronometer, connected to a release button, three push buttons and two conductance platforms. The SensoBuzz console was used for a first evaluation of the simple and complex reaction times of the young tennis players and a subsequent verification, after three months of training. Following the first measurement, the subjects trained weekly with the help of the SensoBuzz application installed on the coach's device (tennis coach and/or physical trainer) diversifying the workouts on reaction times. After three months of training, the results showed shorter reaction times following the training with the SensoBuzz application compared with training without the SensoBuzz application. More specifically, we observed an effect on simple reaction times when comparing players’ training once per week and players training six times per week.

This article illustrates how you can assign a metabolic exercise to a tennis player, after having performed the "Sigma Test" and having acquired the subjective parameters.