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MEDICINA DELLO SPORT
A Journal on Sports Medicine
Official Journal of the Italian Sports Medicine Federation
Indexed/Abstracted in: BIOSIS Previews, EMBASE, Science Citation Index Expanded (SciSearch), Scopus
Impact Factor 0,163
Medicina dello Sport 2008 December;61(4):487-95
language: English, Italian
Plasma oxidant and antioxidant capacity at rest, after exercise-induced dehydration, and after rehydration with an antioxidant drink in elite rowers
Bertone M., Rizzo M., Assorgi R., Muscatello A., Crisostomi S., De Blasis E., Di Giacinto B., Spataro A., Iorio E. L.
1 Italian Rowing Federation, Rome
2 International Observatory for Oxidative Stress, Salerno
Objective. The aim of this study was to analyze oxidative balance, by means of dROMs-tests and BAP-tests, in a group of elite rowers at rest, after a strenuous exercise session, inducing dehydration, and after rehydration with a sports drink with demonstrated antioxidant activity in vitro.
Methods. The study design was double-blind crossover; the study population was 21 athletes (age range, 18-35 years) divided in two groups, one of which was rehydrated with a placebo (oligomineral water), the other with the study drink in the first session; the order was reversed in the second session. In each session the subjects performed a maximal rowing ergometer test, at the end of which they were rehydrated with a placebo or the antioxidant drink masked to subjects and opeatores. Blood samples for oxidative balance analysis (dROMs and BAP tests) were collected at rest, after the ergometer test, and after rehydration.
Results. The group that rehydrated with the study drink showed a significant decrease in the dROMs-test values compared to those at rest without any variations after rehydration. The same subjects showed a significant decrease in the BAP-test values after exercising, compared to rest, followed by a significant increase after rehydration. In contrast, in the athletes rehydrated with the placebo, the dROMs-test values decreased after rehydration. No significant variations in the antioxidant biological potential after rehydration with the placebo were found.
Conclusion. The results of this preliminary study suggest that elite rowers have an oxidative balance characterized by a higher oxidant status compared to the maximum levels in the general population and a plasma antioxidant capacity far over the optimal threshold. Moreover, rehydration with an antioxidant drink after exercise-induced dehydration led to a significant increase in total antioxidant capacity.