The goal of this research is to determine are any positive quantitative changes in the structure and the manifestation of explosive strength caused by the application of elementary school of swimming containing elementary water, applied on primary school students (control and experimental group). Sample variables used for the assessment of explosive strength contained five variables/tests (throwing medicine from lying on back – MESBML, long jump from place – MESSD, Running from a high start 20M – MBR20M, High jump from place – MESVM, High jump – MESVZ). For the development or advancement of expressing explosive strength, elementary swimming school was used in duration of ten days with a frequency of two school lessons per day. Overall research lasted for two week (ten working days). The final quantitative change in the structure and manifestation of explosive strength was determined by applying discriminative analysis. The obtained results show the following: after the final measurement, an expected higher positive change in expressing and manifesting explosive strength in the experimental group, in relation to the final group.