Background: The aim of this study was to determine changes in both aerobic and anaerobic physical capacity as well as in sport-specific skills in footballers as a result of the applied training load within a one-year training period. It was assumed that the type of applied training load would have a significant influence on changes in physical capacity indexes and on differences in soccer technical skills.Material/Methods: The tests applied in the research were: Wingate test 30 sec. version for lower extremities (used to assess anaerobic capacity), PWC170 test (used to assess aerobic capacity) and German Football Association test of soccer technique skills known as DFB test (Deutsche Fussball Bund test).Results: The highest values of maximal power (Pmax=11.2 W·kg-1) and maximal total work volume (W=270.1 J·kg-1) obtained in Wingate test were noted at the end of the preparatory season. Statistically significant differences (p≤0.05) of mean values of the maximal power occurred between the first and the second test. No differences were stated between mean values of total work volume. However, aerobic capacity index and VO2max determined by an indirect method reached the highest values at the end of the competitive season and amounted to 18.6 kgm·kg-1·min-1 and 51.8 ml·kg-1·min-1 respectively. The best results in soccer technical skills test were registered at the end of the preparatory season (343.6 points) and at the end of the competitive season (340.2 points).Conclusions: It is stated that training load applied had a beneficial influence on changes in physical capacity indexes and results of soccer-related skills.