The aim of this graduate thesis is to check whether there is a statistically significant difference in the average duration of the active phase (time elapsed from server contact with the ball to the end of the point) and the average duration of the passive phase (time elapsed from the end of the previous active phase tothe beginning of thenext active phase) between indoor volleyball and beach volleyball on a sample of top senior volleyball players, based on five games played on the indoor volleyball (World Club Championship in Betim, 2019) and beach volleyball (World Championship in Hamburg, 2019). A total of 2392 active and passive phases were measured, of which 954 were measured at beach volleyball matches (484 active and 470 passive phases) and 1438 entities measured in indoor volleyball (727 active and 711 passive phases). The average duration of the active phase of indoor volleyball is 5.55s±4.38 while the average duration of the passive phase is 35.27s±25.96. The average duration of the active phase of beach volleyball is 6.00s±3.44 while the average duration of the passive phase is 33.82s±22.98. Mann Whitney U Test calculated and showed a statistically significant difference (p = 0.00) in the variable active phase of points played in the hall (Md = 3.53, n = 727) and active phase of points played on the sand (Md = 3.43, n = 484), U = 140770.00, z = -5.90 with little effect according to Cohen's criterion (r = 0.14). The Mann Whitney U test (U = 160773.00, z = -1.10) showed no statistically significant difference (p = 0.27) in the average duration of the passive phases at indoor volleyball and beach volleyball.