400 m dash is one of the most demanding athletic events. In addition to power and maximum speed, the training process requires devlopment of high level speed endurance. The runner must achieve the submaximal running speed combined with optimal running technique and low energy consumption and maintain these parameters at a high level throughout the race despite the development of strong fatigue. Achieving optimal results depends on the ability of the runners to run the race in a way that each of 100 m split times of the race is as similar as possible to athletes best 100 m results, ie achieving optimal split times. In top level athletics, small differences in performance affect the end result and thus a tactical preparation for the race that would enable each athlete to obtain optimal results is necessary. The results of this research that was done by analizing female world championships finalists from London 2017. implicate that there is a pattern in 400 m race running. The race is run in such a way that, after start and acceleration, runners achieve optimal running speed in the second half of the first bend. After that, there is maintenance of the running speed during the second 100 m split which is somewhat faster than the first split time because there is no start and acceleration phase. In the second bend, the goal is to minimally decrease in running speed, preserve good running technique, stride frequency and length in order to run the third 100 m split as similar as possible to the first one. Entering the last 100 m split the individual speed endurance of the runner comes to expression and the biggest difference among kinetic variables can be seen. Statistically most significant correlation can be seen among race result and the number of steps in the race with the highest correlation coefficient of 0,82 in 200-300 m split. In this segment there is also the highest correlation coefficient of -0,74 among race result and relative step length. The condition for achieving top results is good running technique and the ability to maintain it despite the fatigue that arises throughout the race in order to minimize the variability of split segments of the race.