Effect of the period of resting in elite judo athletes: hematological indices and copper/ zinc-dependent antioxidant capacity.
The purpose of this study was to evaluate the effect of the resting period on hematological and copper-zinc-dependent antioxidant indices in Brazilian elite judo athletes (n = 7). Venous blood samples were collected after 24-h and 5-d periods of resting following a competition, with an interval of 30 d between collections. Two months prior to and during the study, each athlete received an individualized adequate diet. Body composition was determined at both study periods. The following were analyzed: in whole blood, hemoglobin, hematocrit, red cell count, mean corpuscular volume, mean corpuscular hemoglobin, mean corpuscular hemoglobin concentration, red cell distribution width, and white cell count; in plasma, zinc, copper, iron, ceruloplasmin, and total iron-binding capacity; in erythrocytes, metallothionein, copper/zinc superoxide dismutase, and osmotic fragility. Dietary intake and body composition did not affect the biochemical measurements. A significant reduction in ceruloplasmin and superoxide dismutase activity was found after 5 d compared to 24 h of resting. A significant correlation between erythrocyte metallothionein and red cell distribution width was observed after 24 h of resting (r = -0.83, p = 0.02), whereas positive correlations of metallothionein with hemoglobin, red cell count, and mean corpuscular hemoglobin concentration were observed after 5 d of resting (r >/= 0.76, p </= 0.05). Our results suggest that a longer resting period favors homeostatic adjustments in the erythrocyte population and in the copper/zinc-dependent antioxidant system in elite judo athletes.
Koury
Josely C
JC
Instituto de Química, Departamento de Bioquímica, Laboratório de Bioquímica Nutricional e de Alimentos, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil.
de Oliveira
Cyntia F
CF
Portella
Emilson S
ES
Oliveira
Astrogildo V
AV
Donangelo
Carmen M
CM
D000886:Anthropometry; D000975:Antioxidants / Q000378:metabolism / Q000494:pharmacology*; D001938:Brazil; D003300:Copper / Q000737:chemistry*; D004032:Diet; D004909:Erythrocyte Indices; D004912:Erythrocytes / Q000378:metabolism; D015444:Exercise; D006801:Humans; D007501:Iron / Q000737:chemistry; D008297:Male; D016139:Martial Arts; D008668:Metallothionein / Q000737:chemistry; D009752:Nutritional Status; D009995:Osmosis; D012146:Rest; D013177:Sports; D013482:Superoxide Dismutase / Q000378:metabolism; D013997:Time Factors; D014131:Trace Elements / Q000737:chemistry*; D015032:Zinc / Q000737:chemistry*
D000975:Antioxidants; D014131:Trace Elements; D003300:Copper; D008668:Metallothionein; D007501:Iron; D013482:Superoxide Dismutase; D015032:Zinc