This paper explores the specific endurance of handball players through the implementation of a constructed test on a sample of 12 subjects. The test involved measuring lactate levels before and after testing and monitoring heart rate through a monitor. Graphs depicting the correlation between the total time achieved in the test, lactate, and heart rate were constructed from the obtained results. The analysis of the results showed statistically significant differences and correlations among the variables. A connection was established between the total test duration, physiological parameters (lactate and heart rate), and anthropometric characteristics of the subjects. Basic descriptions of each variable were presented, including the mean, minimum and maximum values, standard deviation, and maximum value of D. This specific test provides valuable insights into the endurance of handball players. Measuring lactate before and after testing allows the assessment of metabolic stress and changes in energy systems during endurance. Monitoring heart rate provides insight into cardiovascular responses during the test. Graphs illustrating the correlation between total time, lactate, and heart rate further illustrate the relationship between physiological parameters and handball players' performance. These results lay the foundation for further research on endurance in handball. Future research should involve a larger number of subjects, different types of handball players, and the analysis of other important factors, such as diet and tactical elements. Additionally, it is important to further develop and refine the specific test to meet all metric characteristics and be a reliable tool for assessing the endurance of handball players. These results can be useful to coaches, conditioning professionals, and handball players in understanding and optimizing endurance to achieve better sports performance.