Document Detail


Energy intakes of ultraendurance cyclists during competition, an observational study.
MedLine Citation:
PMID:  22248496     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
Endurance events >10 hr are becoming increasingly popular but provide numerous physiological challenges, several of which can be attenuated with optimal nutritional intakes. Previous studies in ultraendurance races have reported large energy deficits during events. The authors therefore aimed to assess nutritional intakes in relation to performance among ultraendurance cyclists. This observational study included 18 cyclists in a 384-km cycle race. At race registration each cyclist's support crew was provided with a food diary for their cyclist. On completion of the race, cyclists were asked to recall their race food and drink intakes. All food and fluids were analyzed using a computer software package. Mean (SD) time to complete the race was 16 hr 21 min (2 hr 2 min). Mean (SD) energy intake was 18.7 (8.6) MJ, compared with an estimated energy requirement for the race of 25.5 (7.4) MJ. There was a significant negative relationship between energy intake and time taken to complete the race (p = .023, r2 = -.283). Mean (SD) carbohydrate, fat, and protein intakes were 52 (27), 15.84 (56.43), and 2.94 (7.25) g/hr, respectively. Only carbohydrate (p = .015, r2 = -.563) and fat intake (p = .037, r2 = -.494) were associated with time taken to complete the race. This study demonstrates the difficulties in meeting the high energy demands of ultraendurance cycling. The relationship between energy intake and performance suggests that reducing the energy deficit may be advantageous. Given the high carbohydrate intakes of these athletes, increasing energy intake from fat should be investigated as a means of decreasing energy deficits.
Authors:
Katherine E Black; M L Skidmore P; Rachel C Brown
Related Documents :
15005836 - Dietary lipids and vascular function: uk food standards agency workshop report.
15036786 - Impressions of functional food consumers.
10395606 - Concepts in functional foods: the case of inulin and oligofructose.
22994346 - Antioxidant intake and allergic disease in children.
12362796 - The effect of different iron fortificants on iron absorption from iron-fortified rice.
17127666 - Seasonal variation of colchicine content in colchicum brachyphyllum and colchicum tunic...
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  International journal of sport nutrition and exercise metabolism     Volume:  22     ISSN:  1543-2742     ISO Abbreviation:  Int J Sport Nutr Exerc Metab     Publication Date:  2012 Feb 
Date Detail:
Created Date:  2012-01-17     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100939812     Medline TA:  Int J Sport Nutr Exerc Metab     Country:  United States    
Other Details:
Languages:  eng     Pagination:  19-23     Citation Subset:  IM    
Affiliation:
Dept. of Human Nutrition, University of Otago, Dunedin, New Zealand.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Effects of fed- versus fasted-state aerobic training during ramadan on body composition and some met...
Next Document:  A comparative analysis between the effects of galactose and glucose supplementation on endurance per...