1. Changes of ROS during a Two-day Ultra-marathon Race.
- Author
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Hattori, N., Hayashi, T., Nakachi, K., Ichikawa, H., Goto, C., Tokudome, Y., Kuriki, K., Hoshino, H., Shibata, K., Yamada, N., Tokudome, M., Suzuki, S., Nagaya, T., Kobayashi, M., and Tokudome, S.
- Subjects
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OXIDATIVE stress , *OXIDATION-reduction reaction , *EXERCISE , *PHYSICAL education , *RUNNERS (Sports) , *JAPANESE athletes , *MARATHON running , *LONG-distance running , *ANTIOXIDANTS - Abstract
To assess oxidative stress (OS) induced by endurance exercise, concentrations of serum reactive oxygen species (ROS) were determined in 70 Japanese male amateur runners completing a two-day ultra-marathon race. Serum ROS levels were analyzed at three time points: before the race (baseline), after the 1st day race (mid-race), and after the 2nd day race (goal) (post-race). The means (SE) of ROS were 151.4(3.7) (U. CARR.), 168.7(4.4), and 156.8(4.4), respectively. Significant positive trends were noted between age and serum ROS concentrations at the three race points (p<0.05 for all). After adjusting for age, BMI and average monthly running distance, the baseline serum ROS concentrations were positively associated with completion times of the first-day race, in particular (p<0.05), suggesting that the concentrations may predict physical performance. The ROS production increased at mid-race (p<0.05), but the levels returned to baseline levels at post-race, indicating that an antioxidant defense system may develop post-race to reduce OS. [ABSTRACT FROM AUTHOR]
- Published
- 2009
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