The Effect of Caffeine Supplement on Myeloperoxidase and Acetylcholinesterase Activity during Acute Resistance Exercise in Athletes

Caffeine affects immune response during exercise and it has shown that caffeine reduced concentration of acetyl cholinesterase and myeloperoxidase in mice trained. Thus, in this study the effect of caffeine ingestion on enzyme activities of acetyl cholinesterase and myeloperoxidase was examined after resistance exercise in athletes. 15 athletes in in a randomized, double-blind, placebo-controlled, cross-over study, received 6 mg.kg-1 of caffeine and placebo (maltodextrin) one hour before the resistance exercise (RE). After an hour blood samples were taken from the participants then they participated in resistance exercise and immediately and 15 minutes after resistance exercise, another’s blood samples were taken to analysis acetyl cholinesterase and myeloperoxidase concentration. Analysis of variance with repeated measures at α level 0.05.was used. ANOVA with repeated measures showed significant difference in concentration of acetyl cholinesterase at immediately and 15 minutes after resistance exercise between caffeine and placebo condition (p<0.05), but there was no significant difference between caffeine and placebo in relation to the concentration of myeloperoxidase (p>0.05). In terms of caffeine consumption, acetyl cholinesterase concentration was significantly lower at post compared to pre RE, but in terms of placebo consumption, acetyl cholinesterase concentration was significantly higher at post compared to pre RE (p<0.05). It seems that consumption of caffeine supplement before resistance exercise prevent increase in concentration of acetyl cholinesterase in male athletes, and possibly caffeine from this way lead to reduce inflammatory activities.