This study sought to identify specific physiological variables in football players aged 14–15 years at the Sports Talent Center and to compare the values ​​of these variables before and after one month of training sessions conducted at the center. The study's significance resides in providing accurate scientific indicators of the players' physiological state and the degree of change during the training period thus promoting to the scientific evaluation and observing of training programs for emerging age groups.

The researcher used a observational comparative approach, as it was appropriate for the nature and objectives of the study. Measurements of specific physiological variables were taken for the players at the Sports Talent Center using a physiological scale. Measurements were taken before the start of the follow-up period and repeated after one month of regular training sessions at the center. The study involved a range of physiological variables related to body composition and the players' functional status.

The findings demonstrated a discrepancy in the values ​​of some physiological variables between the pre- and post-measurements, revealing the changes that emerged in the players during the study period. The findings also confirmed the importance of implementing physiological measurements in observing layers' state and evaluating training programs, as these measurements supply objective information that helps coaches in proper planning and direction of the training process.

The researcher advocated the necessity of applying periodic monitoring of the physiological variables of young players in sports talent centers, and incorporating the results of modern measurements in assessing training loads and developing programs designed for this age group in addition to conducting similar studies on other variables and age groups