evidence: Exercise resulted in increased (P < 0.05) antioxidant defenses including erythrocyte SOD, total glutathione, glutathione peroxidase, gene transcripts for interferon-gamma, interleukin-10, and interleukin-1β in blood, 
intervention: 3000 IU d?1 oral superoxide dismutase (SOD) powder for 6?wks - treatment group (TRT)
comparator: placebo (cellulose powder) for 6?wks
outcome: erythrocyte SOD, total glutathione, glutathione peroxidase, gene transcripts for interferon-gamma, interleukin-10, and interleukin-1? in blood, and decreased plasma nitric oxide.