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: exercise
comparator: no exercise
outcome: chondroitin sulfate-846 (CS) in synovial fluid (SF) and adjusted-PGE2, 