The aim of this research is to define a simple method for assessing the level of basic fitness of water polo players (WPP) in the vertical swimming position (VSP). The sample consisted of 35 players, and each subject was tested four times in different training Session with four different weights (one weight per session) . The task of players was to stay in VSP as long as possible using the Standard vertical swimming technique until full exhaustion. On the basis of raw data for each subject the function of dependence Power-Time equation has been calculated for the following nine time intervals (three time intervals per energetic System): 5, 10, 15 seconds for CP , 30, 60, 120 seconds for glycolytic, and 300, 600, 1800 seconds for aerobic energetic System. From the bases of factorial analysis we can conclude that in the context of vertical swimming work ability of top WPP, it is advisable to do tests for VSP in relation to glycolitic and aerobic load realized within 30 seconds (23.95±3.90 kg), and 300 seconds (14.53±1.70 kg), respectively.
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