Effect of a bout of resistance exercise in warm wether on Immune and hormonal responses

Exercise in warm wether can lead to a change in stress hormones and immune factors as compare to normal conditions. The present study aimed to investigate the effects of a bout of resistance exercise in a warm wether on Immune and hormonal responses.

Eight male students with an average of 27±2 years participated in this study. The exercise program was performed for two conditions, at the first week it done in a normal temperature (20° C) and then it performed in a warm temperature (35°C) in the following week. Blood samples were taken one hour before, immediately after and one hour after of resistance exercise. In both environments, body temperature was measured from the axillary area. The serum concentration of Interleukin-15 (IL-15), heat shock protein (HS70), testosterone and cortisol were measured by ELISA method. The ANOVA test for repeated measures were performed after ensuring the normal distribution by the Shapiro - Wilk test for reslts extraction.

 Resistance training in warm wether significantly increased the cortisol (p=0.01), hsp70 (p=0.03), IL-15 (p=0.03), and testosterone (p=0.02) values.

Assuming that cortisol elevation due to warm condition induce IL-15 suppression and IL-15 dropping limit muscle hypertrophy; it can be suggested that a bout of resistance exercise in a warm wether colud attenuate exercise –induced hypertrophy.