题名

Higher Prevalence of Exercise-Associated Hyponatremia in Triple Iron Ultra-Triathletes Than Reported for Ironman Triathletes

DOI

10.4077/CJP.2012.BAA010

作者

Christoph Alexander Rüst；Beat Knechtle；Patrizia Knechtle；Thomas Rosemann

关键词

ultra-endurance ； electrolyte ； plasma sodium ； dehydration

期刊名称

The Chinese Journal of Physiology

卷期/出版年月

55卷3期（2012 / 06 / 01）

页次

147 - 155

内容语文

英文
英文摘要

In a recent study of male and female ultra-marathoners in a 161-km ultra-marathon, the prevalence of exercise-associated hyponatremia (EAH) was higher than reported for marathoners. Regarding triathletes, the prevalence of EAH has been investigated in Ironman triathletes, but not in Triple Iron ultra-triathletes. The aim of this study was to investigate the prevalence of EAH in male ultra-triathletes competing in a Triple Iron ultra-triathlon over 11.4 km swimming, 540 km cycling, and 126.6 km running. Changes in body mass, fat mass, skeletal muscle mass, total body water, haematocrit, plasma volume, plasma sodium concentration ([Na(superscript +)]) and urine specific gravity were determined in 31 male athletes with (means ±standard deviation) 42.1 ±8.1 years of age, 77.0 ±7.0 kg body mass, 1.78 ±0.06 m body height and a BMI of 24.3 ±1.7 kg/m^2 in the 'Triple Iron Triathlon Germany'. Of the 31 finishers, eight athletes (26%) developed asymptomatic EAH. Body mass, fat mass, skeletal muscle mass, and haematocrit decreased, plasma volume increased (P ＜ 0.05), plasma [Na(superscript +)], total body water and urine specific gravity remained stable. The decrease in body mass was related to both the decrease in fat mass and skeletal muscle mass (P ＜ 0.05), but was not related to overall race time, the change in plasma [Na(superscript +)], post-race plasma [Na(superscript +)], or urine specific gravity. The prevalence of EAH was higher in these Triple Iron ultra-triathletes compared to existing reports on Ironman triathletes. Body fluid homeostasis remained stable in these ultra-triathletes although body mass decreased.
主题分类 醫藥衛生 > 基礎醫學
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被引用次数
  1. Salihu, Lejla,Rüst, Christoph Alexander,Rosemann, Thomas,Knechtle, Beat(2016).Sex Difference in Draft-Legal Ultra-Distance Events - A Comparison between Ultra-Swimming and Ultra-Cycling.中國生理學雜誌,59(2),87-99.
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