The research aimed to study the effect of the combination of exercises (aerobic - anaerobic) with maximum intensity on some physiological and physical variables affecting the development of the digital level of swimmers. The research tools include: tests: transitional velocity - a test of the muscular capacity of the two men - a test for flexibility of the shoulders and trunk - a test of absolute strength - a K2015R Refrigerated centrifuge - an Acu Sport device - a Speromiter device - an Oximeter device - a stopwatch - a Treadmill device - the proposed training program. Statistical: the arithmetic mean - the standard deviation - the median - the torsion coefficient - the simple correlation coefficient - the "t" test - the percent improvement. Main results: Increased blood lactic concentration after maximum exertion is an important indicator of improvement in the aerobic and anaerobic capacity of budding swimmers. Increased oxygen saturation of blood and increased concentration of monocarboxylate transporters in the blood are indicative of improved aerobic and anaerobic performance at maximum intensity. The possibility of improving muscle strength while increasing the concentration of lactic acid in the blood. The digital level of swimmers can be predicted in terms of some physical and physiological variables. Keywors: oxygen saturation, monocarboxylate transporters