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https://hdl.handle.net/10216/95791
Author(s): | Antonio Ascensao Rita Ferreira Franklim Marques Eduardo Oliveira Victor Azevedo Jose Soares Jose Magalhaes |
Title: | Effect of off-road competitive motocross race on plasma oxidative stress and damage markers |
Issue Date: | 2007 |
Abstract: | Aim: To analyse the effect of an off-road motocross heat on plasma levels of oxidative stress and damage, blood leucocyte counts and urine catecholamine concentration. Methods: Plasma contents of total, reduced and oxidised (GSSG) glutathione, %GSSG, malondialdehyde (MDA), protein carbonyl and sulphydryl groups, total antioxidant status (TAS), uric acid, and blood neutrophil and lymphocyte counts were evaluated in 10 male top-level riders before, immediately after (0 h) and 1 h after a simulated competitive motocross race. 24-h urine adrenaline, noradrenaline and dopamine concentrations were also measured. Results: The motocross heat resulted in an increase in plasma oxidative stress and damage (p < 0.05). This was shown by a significant increase in %GSSG, TAS, MDA and carbonyls, and by a decrease in sulphydryl groups after the race. There was a significant increase in both plasma uric acid and urine catecholamine concentration after the race (p < 0.05). Blood neutrophil counts increased at 0 and 1 h after exercise (p < 0.05). Lymphocyte count increased from baseline to 0 h, although it decreased from baseline and 0 to 1 h after exercise (p < 0.05). Conclusion: The data reinforce the marked metabolic and hormonal demands imposed by motocross, resulting in a condition of enhanced plasma oxidative stress and damage. |
Subject: | Ciências da saúde Health sciences |
Scientific areas: | Ciências médicas e da saúde::Ciências da saúde Medical and Health sciences::Health sciences |
URI: | https://hdl.handle.net/10216/95791 |
Document Type: | Artigo em Revista Científica Internacional |
Rights: | restrictedAccess |
Appears in Collections: | FADEUP - Artigo em Revista Científica Internacional FFUP - Artigo em Revista Científica Internacional |
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