Mise en évidence de la sollicitation du cycle des purines nucléotides lors d’un combat de judo

Abstract

Objective. – Energy solicitation during a judo match and the kinetics of recovery were assessed by measuring the metabolites of oxypurine cascade level and the glycolytic pathway. Methods. – Venous blood samples were taken from sixteen national judo athletes (aged 18.4 ± 1.6 years), before (T1) and at 3 minutes (T2), 1 hour (T3) and 24 hours (T4) post-match. A 7-day diet record was used to evaluate the values for nutrient intakes. Results. – Nutrient analysis indicated that these athletes followed a low carbohydrate diet. Plasma lactate concentration rose to 12.3 ± 1.8 mmol l –1 at the end of the match. An increase in extracellular markers of muscle adenine nucleotide catabolism, urea and creatinine levels was observed at T2 while uric acid levels remained unchanged. Persistent high concentrations of urea were observed during the post-training recovery period for 24 h. Ammonia, hypoxanthine, xanthine and creatinine values returned to their control levels within 12 h of recovery. Uric acid concentrations rose from T3 and did not return to baseline 24 h after the match. Conclusions. – These results showed that a judo match induces mobilisation of protein metabolism.