Aim of this study was to analyze diferences between tests for anaerobic energetic capacity assessment and to determine connections of these tests so that their results could be more appropriately used in planning and programming of the training process. The sample of entitets consists of 144 football players (21.05±3.36 years old, height 182.00±6.16 cm, weight 76.11±7.73 kg and relative oxygen intake 59.31±5.18 mlO2/kg/min). By conducting tests of functional abilities (field tests 20m and 300m and laboratory test KF1) 6 variables were obtained (by measurement and calculation) which described their conditioning preparation. Statistically significant correlations (p<0.05) were found between the results of field and laboratory tests, while the level of connection varies. Thus, the medium correlation level between the KF1 protocol (F1ANm and F1BrzAN) and the 300m test (MBI300m) was determined in amounts of r = -0.37 and r = -0.28. The correlations between the KF1 protocol (F1Anm and F1BrzAN) and the 20m sprint test (MES20m) are low and in amounts of r = - 0.18 and r = -0.19, while the correlation between the field tests 20m sprint (MES20m) and 300m (MBI300m) is again medium and in amount of r = 0.44. From the results of this study, it can be concluded that the results describing the anaerobic capacity in the test on the treadmill could have a higher correlation with the results of the 20m sprint and the "300m shuttle run" in sports competitors who do not have (at least not so sudden) changes of direction in their movement structure like football players, for example athletes, triathletes, etc.