Quick Search:

uzh logo
Browse by:

Zurich Open Repository and Archive

Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-13201

Knechtle, B; Schwanke, M; Knechtle, P; Kohler, G (2008). Decrease in body fat during an ultra-endurance triathlon is associated with race intensity. British Journal of Sports Medicine, 42(7):609-613.

[img] PDF - Registered users only
View at publisher
Accepted Version


Objective: To investigate whether adipose subcutaneous
tissue or skeletal muscle mass decreased during a nonstop
ultra-endurance triathlon.
Design: Descriptive field study.
Setting: The Triple Iron Triathlon Germany 2006 in Lensahn: 11.6 km swimming, 540 km cycling and 126.6 km running.
Subjects: 17 male Caucasian triathletes, mean (SD) age
39.2 (7.5) years, height 178 (5) cm, body mass 80.7 (8.9) kg and body mass index (BMI) 25.4 (2.4) kg/m2.
Interventions: None.
Main outcome measurements: Determination of body mass, skin-fold thicknesses, limb circumference, skeletal muscle mass and percentage body fat in order to show changes after the race.
Results: A significant decrease was shown for body mass (p,0.001), BMI (p,0.001) and calculated percentage body fat (p,0.001) whereas skeletal muscle mass did not change significantly (p.0.05). Circumferences of the thigh, upper arm and calf did not decrease significantly (p.0.05), whereas all skin-fold thicknesses decreased significantly (p,0.05), with the exception of those at the chest and thigh. A significant correlation was found between the loss of percentage body fat and the loss of body mass (p,0.01, r2=0.55) as well as change in percentage body fat with race
performance (p,0.05, r2=0.24).
Conclusions: Ultra-endurance triathletes at the Triple
Iron Triathlon Germany 2006 showed a significant decrease in body mass and percentage body fat, where decrease in percentage body fat was associated with race intensity.


20 citations in Web of Science®
24 citations in Scopus®
Google Scholar™



50 downloads since deposited on 13 Feb 2009
14 downloads since 12 months

Detailed statistics

Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > University Hospital Zurich > Institute of General Practice
Dewey Decimal Classification:610 Medicine & health
Date:July 2008
Deposited On:13 Feb 2009 10:51
Last Modified:05 Apr 2016 12:59
Publisher:BMJ Publishing Group
Publisher DOI:10.1136/bjsm.2007.040956
PubMed ID:18048432

Users (please log in): suggest update or correction for this item

Repository Staff Only: item control page