SUMMARY Lithuanian army physical training mission-is to form a healthy, strong, well physically prepared soldier, ready to fulfil all raised tactical assignments. The aim of this research was to evaluate the endurance of soldiers, developing the cardiovascular function abilities in performing of aerobic loads. Investigation was done in Kaunas city “Vytautas Magnus Keepers” battalion stadium. The request was given and the permission of the battalion commander was received in order to perform the biomedical research. Six athletes elevating high technique endurance participated in this research. The participants voluntarily agreed to perform the testing. All the participants (soldiers and runners) after the individual warming-up, ran a 5km cross-country (the task of the exercise was endurance training: even running in an aerobic zone). During the second research the runners were running a 12km cross-country (the task of the exercise was endurance training: even running in an aerobic zone). Using the heart rate (HR) pulse monitor “Polar-S810” The changes of HR was measured (the instantaneous account of HR and the average (HRmax), an account of the chosen length (each 1000m) and the duration (t) of chosen running length (each 1000m running length). The index of biological load value was counted of those registered indicators. In the third research the participants in LKKA laboratory of Kinesiology performed the search of qualification: the test of Roufier physical load, while... [to full text]