## 4 Discussion  
The main findings of our study were the close relationship between the SAST results and the 100-m freestyle race. The values of indices from the initial and final parts of these motor tasks demonstrated similar values, and the correlation coefficients between them were from high to almost absolute. However, a smaller similarity was noted in relation to the kinematic indices for the 200-m freestyle race. At the same time, it has not been shown that the determined fatigue indices were related to the results for short and middle distances. Among the determined indices from the SAST sample, six of them (\(\rm v_{S}\), \(\rm SL_{S}\), \(\rm SI_{S}\), \(\rm v_{F}\), \(\rm SL_{F}\), \(\rm SI_{F}\)) were significantly negatively correlated with the result for 100 m. The only variables unrelated to time during the 100-m distance were \(\rm SR_{S}\) and \(\rm SR_{F}\). The variables from the SAST, determined on the basis of the times needed to cover the initial and final sections, i.e., \(\rm v_{S}\), \(\rm v_{F}\), \(\rm SI_{S}\), \(\rm SI_{F}\), demonstrated particularly high correlation coefficients. This shows high similarity in the movement patterns for the SAST and 100-m freestyle race. Slightly lower but significant correlations were also noted for the indices from this test and the 200-m freestyle race. In this case, \(\rm v_{S}\), \(\rm v_{F}\), and \(\rm SI_{S}\) had the highest coefficients. Smaller but still significant correlations were recorded in relation to \(\rm SI_{F}\), \(\rm SR_{S}\) as well as \(\rm SL_{F}\). In the past, relationships were searched for between the results of tests based on covering a given distance several times and the results in various swimming races [14; 20; 21; 22]. The literature in this field is primarily focused on series aimed at assessing aerobic capacity and their usefulness within the context of predicting the outcome for middle or long distances. Such tests, aimed at assessing anaerobic capacity, should be performed at maximum intensity, with the duration of the task short, while the interval between repetitions should not be long. Some of the tests of this type carried out so far [23] do not meet the above given criteria. To the best our knowledge, the evaluation of correlations between this type of test and the result for short distances was studied only by [PERSON] et al. [24]. However, they did not show that the 8 \(\times\) 15 m test, with an interval of 30 s, was useful within the context of predicting the result for the 100-m freestyle. For this reason, the comparison of the numerical data obtained in this study to that available in the literature is limited. In this study, a strong correlation was found between kinematic indices for the SAST and 100-m freestyle tests. The kinematic indices determined during the SAST showed similar values as during the 100-m freestyle swim. These concerned both the values of the first two (\(\rm v_{S}\), \(\rm SR_{S}\), \(\rm SL_{S}\), \(\rm SI_{S}\)), as well as the final two repetitions for the 25-m sections (\(\rm v_{F}\), \(\rm SR_{F}\), \(\rm SI_{F}\)), as well as their equivalents from the first (0-50 m) and second (50-100 m) parts of the 100-m freestyle race. Small differences between the values of kinematic variables indicate a very high similarity in terms of swimming technique for the SAST and the short-distance race. This is also evidenced by the values of the correlation coefficients between all the variables of these two motor tasks. At the same time, some of the indices determined in the SAST and during the 100-m freestyle race (\(\rm v_{S}\), \(\rm v_{F}\), \(\rm SR_{S}\), \(\rm SR_{F}\), \(\rm SL_{S}\)) differed significantly from those describing the 200-m freestyle. The probable cause for this was effort duration during the 100- (\(\rm T_{100}\) = 58.62 \(\pm\) 3.15 s) and 200-m freestyle races (\(\rm T_{200}\) = 130.33 \(\pm\) 7.88 s), which influenced the different contribution of aerobic and anaerobic changes in the supply into energy during these motor tasks.