The effect of resistance exhaustive exercise and acute caffeine ingestion on total antioxidant capacity and oxidative stress indices in male volleyball players

 Objective: The aim of this
study was to identify the effect of acute caffeine intake on total ‌‌antioxidant
capacity (TAC) and oxidative stress indices (MDA) in male volleyball players
following one-session resistance exhaustive exercise.   Materials
and Methods:
Twenty male volleyball players (mean
age 21.20±1.10 years, fat 10.75±2.78% and BMI 22.95±0.99 kg.m2)
participated in a randomized, quasi-experimental, double-blind and repeated
measured (three stages) design. Then, all subjects were allocated to two
homogeneous groups (in order: 9 mg.kg-1.day caffeine or
dextrose). All subjects participated in a single-session resistance
weight-exercise (7 stations in 3 sets per station with 80% of 1-RM until
exhausted). Blood samples were taken at three stages (baseline and 45 min after
supplementation, and immediately after the exercise) were determined for changes in
serum TAC and MDA.    Results: The results showed
that the acute caffeine intake has no significant effect on the basal serum TAC
and MDA (p≥0.05). Moreover, one-session resistance exhaustive exercise significantly reduced TAC (P≤0.05) and significantly
increased 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).
   Conclusion: The present results
show that acute
caffeine
consumption does
not increase basal TAC and could not decrease the undesirable
alterations of serum MDA induced by one-session of resistance exhaustive
exercise in male volleyball players.