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| Research article summary (published 27 Feb 2002): |
Energy balance during an ironman triathlon in male and female triathletes.
Full Abstract
Energy balance of 10 male and 8 female triathletes participating in an Ironman event (3.8-km swim, 180-km cycle, 42.2-km run) was investigated. Energy intake (EI) was monitored at 7 designated points by dietary recall of food and fluid consumption. Energy expenditure (EE) during cycling and running was calculated using heart rate-VO, regression equations and during swimming by the multiple regression equation:
Y = 3.65v+ 0.02W- 2.545 where Yis VO,in L x min(-1), v is the velocity in m s(-1), Wis the body weight in kilograms. Total EE (10,036 +/- 931 and 8,570 +/- 1,014 kcal) was significantly greater than total EI (3,940 +/- 868 and 3,115 +/- 914 kcal, p <.001) for males and females, respectively, although energy balance was not different between genders. Finishing time was inversely related to carbohydrate (CHO) intake (g x kg(-1) x h(-1)) during the marathon run for males (r = -.75,p <.05), and not females, suggesting that increasing CHO ingestion during the run may have been a useful strategy for improving Ironman performance in male triathletes.
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Author information
Author/s: Kimber, Nicholas E (NE); Ross, Jenny J (JJ); Mason, Sue L (SL); Speedy, Dale B (DB);
Affiliation: Department of Human Biology and Nutritional Sciences at the University of Guelph, ON, Canada.
Journal and publication information
Publication Type: Journal Article; Research Support, Non-U.S. Gov't
Journal: International journal of sport nutrition and exercise metabolism (Int J Sport Nutr Exerc Metab), published in United States. (Language: eng)
Reference: 2002-Mar; vol 12 (issue 1) : pp 47-62
Dates: Created 2002/05/07; Completed 2002/10/25; Revised 2006/11/15;
PMID: 11993622, status: MEDLINE (last retrieval date: 11/6/2008)
Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.
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