Table 2: Serum thiobarbituric-acid-reactive substances (TBARSs), xanthine oxidase (XO), catalase (CAT), reduced glutathione (GSH), superoxide dismutase (SOD), and total antioxidant capacity (T-AOC) in adolescent runners, cyclists, and untrained subjects are shown.

Runners ( )Cyclists ( )Untrained ( )

TBARS (nmol·mL−1)
XO (U·L−1) a, b
GSH (mg·L−1) a, b
CAT (U·mL−1) a a, b
T-AOC (U·mL−1)
SOD (U·mL−1)

aSignificant at when compared with untrained group.
bSignificant at when compared with runners.
Values are mean ± SD.