The purpose of this study was to examine the effect of incremental continuous running as well as a morning and evening training on changes in serum innunoglobulins including IgA, IgG, IgM and testosterone and cortisol responses. For this reason 28 male athletic students were purposefully selected and randomly divdied into two groups. The participants trained according to an incremental continuous running program with a certain heart rate for two months (16 sessions). To determine the amount of serum immunoglobulins as well as cortisol and testosterone hormones, the participants’ blood samples were taken twice, once 24 hours before the first training session and once 24 hours after the training session. The results showed that was not any significant difference between the two groups in the amounts of IgA, IgM, IgG serum in the pre-test and the post-test.
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