The aim of this paper is to compare the swimming fitness of students at our university. We wanted to know whether both swimmers and non-swimmers could improve their swimming fitness at the end of training and whether swimming fitness of university students had changed in the last 10 years. The first part of the analysis covered the years 2007 to 2013. We examined whether both groups were able to improve their swimming fitness. We used the tests of proportions to analyse the data. The second part of the analysis covered the years 2002 and 2012. We measured the times of students both at the beginning and at the end of the swimming training in these years. We questioned whether the swimming fitness of university students has changed in this time span. To compare the swimming fitness in 2002 and 2012 we used the Wilcoxon test for paired samples. We found that 138 non-swimmers improved their swimming fitness at the end of the swimming training. It has been shown that non-swimmers made up less than 10 % of the total number of students who attended the swimming training between the years 2007 and 2013. All non-swimmers improved in the academic years 2007/2008, 2011/2012 and 2012/2013. 92 non-swimmers swam a limited 100 meters distance. We have shown that 60 % of non-swimmers improved their swimming fitness at the end of the swimming training. Furthermore, we found that a third of students had failed to swim the limit of 100 meters. The required limit of 100 meters was swam by 1 029 students. 3 432 students improved the swimming fitness at the end of the swimming training. Furthermore, we found that the swimming fitness of students improved both in 2002 and 2012. Finally, we found that the swimming fitness of our students has improved in 10 years. We managed to prove almost all the statistical hypothesis at the significance level of 0.05 and therefore we could consider them to be statistically significant. The procedure that we used to analyse the swimming fitness of students at the Tomas Bata University in Zlín may be beneficial for the analysis of the swimming fitness not only at other universities, but in different workplaces that deal with measuring the performance of athletes.