The goal of thisastudy was toadetermine whetherathere will be a statistically significant difference among swimmers andaparaswimmers in the variables maximal oxygen intake (VO2max) in general and in VO2max values referring to the type of swimmer in relation with FINA and MD points. The data of Croatian senior competitors, specifically 12 elite swimmers and 12 elite paraswimmers, are processed in this research. The sample in each group consisted of eight male competitors and 4 female competitors. The data was statistically processed in Statistica 14.0, and the methodsathat were usedain the studyawere Student's T-test for independentasamples and descriptive statistics to aquire the Median. The outcome of the study showedaa statistically significantadifference in two variables, namely the difference among swimmers and paraswimmers in the values of maximum oxygen intake with p value = 0.023599 and the difference between swimmers and paraswimmers in VO2max values in relation to FINA and MD points with the p value = 0 ,008202. After processing the data, it was determined that thereais no statisticallyasignificant difference among swimmers and paraswimmers in VO2max values inarelation to the typeaof swimmer with the p value = 0.532708.