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Age-related changes in ultra-triathlon performances

Beat Knechtle12*, Christoph Alexander Rüst2, Patrizia Knechtle1, Thomas Rosemann2 and Romuald Lepers3

Author Affiliations

1 Gesundheitszentrum St. Gallen, Vadianstrasse 26, St., Gallen, 9011, Switzerland

2 Institute of General Practice and Health Services Research, University of Zurich, Rämistrasse 71, Zurich, 8006, Switzerland

3 INSERM U1093, Faculty of Sport Sciences, University of Burgundy, Esplanade Erasme, Dijon, 21000, France

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Extreme Physiology & Medicine 2012, 1:5  doi:10.1186/2046-7648-1-5

Published: 1 October 2012



The age-related decline in performance has been investigated in swimmers, runners and triathletes. No study has investigated the age-related performance decline in ultra-triathletes. The purpose of this study was to analyse the age-related declines in swimming, cycling, running and overall race time for both Triple Iron ultra-triathlon (11.4-km swimming, 540-km cycling and 126.6-km running) and Deca Iron ultra-triathlon (38-km swimming, 1,800-km cycling and 420-km running).


The age and performances of 423 male Triple Iron ultra-triathletes and 119 male Deca Iron ultra-triathletes were analysed from 1992 to 2010 using regression analyses and ANOVA.


The mean age of the finishers was significantly higher for Deca Iron ultra-triathletes (41.3 ± 3.1 years) compared to a Triple Iron ultra-triathletes (38.5 ± 3.3 years) (P < 0.05). For both ultra-distances, the fastest overall race times were achieved between the ages of 25 and 44 years. Deca Iron ultra-triathletes achieved the same level of performance in swimming and cycling between 25 and 54 years of age.


The magnitudes of age-related declines in performance in the three disciplines of ultra-triathlon differ slightly between Triple and Deca Iron ultra-triathlon. Although the ages of Triple Iron ultra-triathletes were on average younger compared to Deca Iron ultra-triathletes, the fastest race times were achieved between 25 and 44 years for both distances. Further studies should investigate the motivation and training of ultra-triathletes to gain better insights in ultra-triathlon performance.

Swimming; Cycling; Running; Ultra-endurance