The effect of acute aerobic exercise with vitamin C supplementation on pulmonary function of athletes with Exercise-Induced Bronchospasm

Acute exercise as a stressful physiological factor, may lead to immune response, and therefore can significantly increase the levels of inflammatory indices. The aim of this study was to compare the effect of one session of acute aerobic activity along vitamin C supplementation on pulmonary function of athletes with exercise induced bronchospasm. In this quasi-experimental study, 31 athletes were selected homogeneously according to Bruce treadmill test to determine VO2max above 45 ml‏‏‏‏‏‏‏‏‏‏‏‏‏‏‏‏‏/‏‏‏kg‏‏‏‏‏‏‏‏‏‏‏‏‏‏‏‏‏/‏‏‏min, further they randomly divided into two vitamin C (N=15) and control (N=15) groups. The subjects were asked to consume 500 mg‏‏‏‏‏‏‏‏‏‏‏‏‏‏‏‏‏/‏‏‏day vitamin C, three weeks during two-stage implementation of pre-test and post-test during exhaustive activity. The VC, FVC, FEV1, FEV1‏‏‏‏‏‏‏‏‏‏‏‏‏‏‏‏‏/‏‏‏FVC, PEF and MVV were measured using digital spirometer. The variables were statistically analyzed by paired-sample t test for intra-group comparison and ANCOVA for between groups comparison at a significant level of p<0.05, using SPSS19 software. Consuming vitamin C, during three weeks had no significantly effect on VC (p=0.06); FVC (p=0.83); FEV1 (p=0.60); FEV1‏‏‏‏‏‏‏‏‏‏‏‏‏‏‏‏‏/‏‏‏FVC (p=0.69); PEF (p=0.18) and MVV (p=0.79), Moreover there was no significant difference between both experimental and control groups in VC (p=0.63); FVC (p=0.31); FEV1 (p=0.12); FEV1‏‏‏‏‏‏‏‏‏‏‏‏‏‏‏‏‏/‏‏‏FVC (p=0.06); PEF (p=0.36) and MVV (p=0.56). It seems that vitamin C had no significantly effect on mild exercise-Induced bronchospasmin athletes.