We analysed the cardiovascular parameters during bicycle ergometry in healthy children and adolescents and oncological patients after complete anthracycline therapy.There were no differences between group AT and Co either in baseline parameters or in mean values in studied parameters during exercise testing. The distribution histograms of maximal tolerated load and maximal tolerated load per kg of body weight differed significantly (p<0.05, Ftest).Conclusion: In spite of significant difference in distribution of tolerated load during exercise between treated patients and controls, the differences in mean values of all parameters were insignificant. This indicates that in majority of subjects after anthracycline treatment the load tolerance is not affected.