Document Detail

Effect of a multistage ultra-endurance triathlon on body composition: World Challenge Deca Iron Triathlon 2006.
MedLine Citation:
PMID:  17601765     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: To investigate the effect of a multistage ultra-endurance triathlon on body composition in ultra-triathletes. DESIGN: Descriptive field study. SETTING: The "World Challenge Deca Iron Triathlon 2006" in Monterrey, Mexico, in which every day for 10 consecutive days athletes had to perform the distance of one Ironman triathlon. SUBJECTS: Eight male ultra-endurance athletes (mean (SD) age 40.6 (10.7) years, weight 76.4 (8.4) kg, height 175 (4) cm and body mass index (BMI) 24.7 (2.2) kg/m2). INTERVENTIONS: None. MAIN OUTCOME MEASUREMENTS: Determination of body mass, protein mass, body fat, per cent body fat, mineral mass, total body water, intracellular water, extracellular water and lean body mass with a direct segmental multifrequency bioelectrical impedance method before the race and after each stage in order to show changes in body composition. RESULTS: A statistically significant decrease of body mass (-2.4 kg, p = 0.014), body fat (-5 kg, p = 0.0078) and per cent body fat (-6.4%, p = 0.0078) occurred at the end of the first day compared to values taken in the pre-race period. In contrast, at the same time, a statistically significant increase of protein mass (+0.7 kg, p = 0.035), mineral mass (+0.2 kg, p = 0.04), total body water (+1.8 litres, p = 0.042), intracellular water (+1.6 litres, p = 0.034) and lean body mass (+2.6 kg, p = 0.023) was shown. After the first day until the end of the challenge, body fat (-3 kg, p>0.05) and per cent body fat (-3.9%, p>0.05) showed a statistically significant decrease, whereas the other parameters showed no changes. CONCLUSIONS: Athletes taking part in a multistage ultra-endurance triathlon over 10 Ironman triathlon distances in 10 consecutive days lost 3 kg of body fat; skeletal muscle mass, mineral mass and body water were unchanged.
B Knechtle; O Salas Fraire; J L Andonie; G Kohler
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Publication Detail:
Type:  Journal Article     Date:  2007-06-29
Journal Detail:
Title:  British journal of sports medicine     Volume:  42     ISSN:  1473-0480     ISO Abbreviation:  Br J Sports Med     Publication Date:  2008 Feb 
Date Detail:
Created Date:  2008-02-07     Completed Date:  2008-05-09     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0432520     Medline TA:  Br J Sports Med     Country:  England    
Other Details:
Languages:  eng     Pagination:  121-5; discussion 125     Citation Subset:  IM    
Gesundheitszentrum St Gallen, St Gallen, Switzerland.
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MeSH Terms
Adipose Tissue / physiology
Athletic Performance / physiology*
Bicycling / physiology*
Body Composition / physiology*
Muscle, Skeletal / physiology
Physical Endurance / physiology*
Running / physiology*
Swimming / physiology*

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