Acute and chronic effect of high-intensity interval training in nutral and hot environment on serum BDNF levels in healthy men

The purpose of this study was to determine the effect of high intensity interval training in temperate and warm environment on serum BDNF in healthy men. In this research, 24 healthy male students according to vVo2max estimation divided to 3 groups, training in the warm environment (n=8), training in the temperate environment (n=8) and control (n=8) categorized as matched. Subjects of experimental group were trained 12 sessions for two weeks. Each session included 5 set of 150 seconds running on treadmill with %85-90 of vVo2max with 150 seconds active recovery between each set with 50 percent of vVo2max. Serum BDNF was assessed using ELISA kits and the data were analyzed by one-way ANOVA. The results show that one session high intensity interval activity in warm (p=0.018) and temperate (p=0.045) environment induce significant increment in serum BDNF, However between training group, significant difference was not observed (p=0.262). Furthermore two weeks of high intensity interval training in warm (p=0.001) and temperate (p=0.012) environment resulted in significant increment in serum BDNF, also two weeks of training on the level of BDNF not produce significant difference between training and control groups (p=0.267). It seems that high intensity interval training regardless of whether in temperate or warm environment increases the level of BDNF.