The effect of acute caffeine ingestion on oxidative response in male volleyball players following one-session resistance exhausting exercise

This study was conducted to identify the effect of acute caffeine intake and one-session resistance exercise on total antioxidant capacity (TAC) and serum malondiadehyde (MDA) in male volleyball players. Twenty male volleyball players (age 21.20±1.24 years, body fat 10.75±2.78 %, and BMI 22.95±0.99 kg.m2) in a randomized design in two equal groups: supplement and placebo (6 mg.kg-1 caffeine and dextrose) were allocated. After the supplementation all subjects were participated in resistance weight- exercise protocol (7 stations in 3 sets per station with 80% of 1-RM until exhausted). Changes in serum of TAC and MDA were determined in three phases (before and 45 min after the supplementation and immediately after the exercise protocol).The normal data were expressed as Mean (±SD) and analyzed by repeated measure ANOVA, bonferroni and independent T test at α≤0.05. The results show that the acute caffeine intake had no significant effect on the basal serum TAC and MDA (P≥0.05). Whereas, one-session resistance exhaustive exercise significantly reduced TAC (P≤0.05) and significantly increased in the MDA (P≤0.05). However, no significant differences in any of the measured variables between the groups were found immediately after resistance exercise (P≥0.05). The present results show that acute caffeine consumption probable had no significant increased basal TAC and also can not decrease the undesirable alterations of serum MDA induced one-session of resistance exercise in male volleyball players.