Influencia de un medio ironman en parámetros sanguíneos

espanolIntroduccion: El triatlon es un deporte de resistencia en el que se realizan tres modalidades deportivas de forma consecutiva: natacion, ciclismo y carrera. Durante un triatlon de media distancia se ha constatado que la perdida de fuerza muscular se relaciona con la concentracion de marcadores sanguineos de dano muscular. Tambien se ha observado un desequilibrio electrolitico en triatletas durante triatlones de larga distancia. Proposito: El objetivo de este estudio fue analizar parametros sanguineos que determinan deshidratacion (masa corporal y osmolalidad), perdida de electrolitos (cloro, potasio, sodio y calcio) y dano muscular (mioglobina, CK y LDH) en un triatlon de media distancia. Metodos: Se extrajo sangre y se peso, antes y despues de un triatlon de media distancia, a 34 triatletas con una edad de 35,7 �} 6,5 anos, cuyo tiempo medio fi nal en meta fue de 5:12:20 �} 00:34:59 horas. Las muestras fueron medidas con analizadores bioquimicos estandar. Resultados: Se observaron incrementos signifi cativos (P Conclusiones: Una competicion de triatlon de media distancia incrementa signifi cativamente los marcadores sanguineos de dano muscular. Los valores de calcio y sodio, asi como las variables que indican deshidratacion, tambien se ven afectados de manera signifi cativa. EnglishIntroduction: The triathlon is an endurance sport in which 3 consecutive events are performed: swimming, cycling and running. It has been found that the loss of muscle strength is related to the blood markers� concentration of muscle damage during a half-ironman triathlon. It has also been observed that an electrolyte imbalance is produced in triathletes during long distance triathlons. Purpose: The aim of this study was to analyze blood parameters to determine dehydration (body mass and osmolality), electrolyte loss (chlorine, potassium, sodium and calcium) and muscle damage (myoglobin, CK and LDH) in a half-ironman triathlon. Methods: Before and after the race body weight was measured and blood samples were extracted to 34 triathletes aged 35.7 ± 6.5 years whose average fi nish time was 5:12:20 ± 00:34:59 hours. Standard biochemical analyzers were used to measure the samples. Results: Signifi cant increases (P in CK (from 169.3 ± 86.2 to 564.5±428.9 U � L-1); and in LDH (318.4 ± 56.2 to 479.0 ± 78.6 U � L-1). It was also found a signifi cant increase (P Conclusions: Signifi cant increases in blood markers of muscle damage occur in a half-ironman triathlon. Dehydration markers, as well as calcium and sodium values, are also aff ected in a signifi cant way.