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Rev. bras. med. esporte ; 13(6): 397-401, nov.-dez. 2007. graf, tab
Article in Portuguese | LILACS | ID: lil-487269

ABSTRACT

O Triatlon Ironman caracteriza-se por ser uma atividade de resistência constituída por 3,8km de natação, 180km de ciclismo e 42,2km de corrida, no qual o atleta exercita-se, em média, por cerca de 13 horas. Neste contexto, o atleta exposto a tal carga de esforço e adversidades ambientais, experimenta alterações orgânicas agudas em seus sistemas biológicos, incluindo os distúrbios hidroeletrolíticos. O objetivo deste estudo é descrever as alterações hídricas e eletrolíticas encontradas em atletas de triatlon Ironman. De 2002 a 2005 foram avaliados 109 atletas voluntários antes e imediatamente após as provas realizadas em Florianópolis-SC Brasil, com análise sanguínea dos eletrólitos sódio, e potássio, e medida de massa corporal. Os dados do sódio sérico de 89 atletas foram correlacionados com o grau de desidratação e modificações percentuais de peso corporal. Dados de 77 atletas, quanto ao potássio sérico, foram avaliados isoladamente de forma descritiva. Seis atletas (6,7 por cento) apresentaram-se euhidratados ou superhidratados ao final da prova, 50 atletas desidrataram de 0 a 3 por cento (56,2 por cento), 29 de 3 a 6 por cento (32,6 por cento) e 4 atletas (4,5 por cento) desidrataram mais que 6 por cento. Houve uma tendência a ocorrer hiponatremia entre aqueles que desidrataram menos ou ganharam peso. O potássio teve um comportamento dentro dos limites da normalidade em toda amostra. Conclui-se que os distúrbios hidroeletrolíticos (hiponatremia e desidratação) são incidentes nesta modalidade esportiva, sendo a superhidratação a etiologia provável da hiponatremia denotada pelo ganho ou perdas discretas de peso.


The Ironman Triathlon is characterized for being an endurance activity consisting of 3.8 km of swimming, 180 km of cycling and 42.2 km of running, in which the athlete exercises an average of about 13 hours. In this context, the athlete exposed to such load of effort and environmental adversities, experiences acute organic alterations in his biological systems, including hydroelectrolytic disturbs. The objective of this study is to describe the hydric and electrolytic alterations found in Ironman triathlon athletes. From years 2002 to 2005, 109 volunteer athletes have been evaluated before and immediately after the events which took place in Florianópolis-SC Brazil, with blood analysis of sodium and potassium electrolytes, and body mass measurement. Sodium serum data from 89 athletes have been correlated with the degree of dehydration and percentage alterations of body weight. Data of 77 athletes concerning the serum potassium were separately evaluated in a descriptive way. Six athletes (6.7 percent) were euhydrated or superhydrated at the end of the test; 50 athletes were dehydrated from 0 to 3 percent (56.2 percent); 29 from 3 to 6 percent (32.6 percent) and 4 athletes (4.5 percent) were dehydrated more than 6 percent. There was a tendency to hyponatremia among those who had dehydrated less or gained weight. Potassium behaved within the limits of normality in the entire sample. It was concluded that hydroelectrolytic disturbs (hyponatremia and dehydration) are recurrent in this sportive modality, being superhydration the probable etiology of hyponatremia denoted from profit or small weight loss.


Subject(s)
Humans , Male , Athletes , Dehydration , Water-Electrolyte Imbalance/diagnosis , Water-Electrolyte Imbalance/prevention & control , Water-Electrolyte Imbalance/therapy , Fluid Therapy , Hyponatremia , Potassium Deficiency , Water-Electrolyte Imbalance
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