RESUMO
Amount of physical activity during basic training period [BTP] should provide a suitable level of physical fitness at the end of this period and also be matched to soldiers' physical fitness baseline [PFB] in order to decrease the occurrence of musculoskeletal injuries [MSI] during BTP. The aim of this study was to determine the changes in soldiers' aerobic fitness and muscle endurance during BTP and also to determine the relationship between soldiers' PFB and occurrence of MSI during IBT. In this semi-experimental study, 150 soldiers of Iran military randomly selected as sample group. We evaluated them at the beginning and the end of BTP by means of Army Physical Fitness TEST. To examine the relationship between incidence of MSI during BTP and PFB frequency of the MSI in the sample were recorded. The finding show that at the end of the BTP, physical fitness, aerobic fitness, upper body endurance and abdominal endurance increased significantly, but only in case of upper body endurance, standard level was not implemented. There was a significant negative relationship between incidence of MDI with physical fitness, aerobic fitness and upper body endurance. In accordance with the results, although current program of BTP has positive effects on soldiers' physical fitness, it doesn't bring about all aspects of physical fitness needed to successful military operations. By categorizing and training the soldiers based on the PFB. It may be possible to decrease the incidence of MSI