Document Detail

Nutritional Intake and Gastrointestinal Problems during Competitive Endurance Events.
MedLine Citation:
PMID:  21775906     Owner:  NLM     Status:  Publisher    
There is little information about the actual nutrition and fluid intake habits, and gastrointestinal (GI) symptoms of athletes during endurance events. PURPOSE:: To quantify and characterize energy, nutrient and fluid intakes during endurance competitions and investigate associations with GI symptoms. METHOD:: 221 endurance athletes (male and female) were recruited from two Ironman triathlons (IM Hawaii and IM GER), a half-Ironman (IM70.3), a MARATHON, a 100/150 km CYCLE race. Professional cyclists (PRO) were investigated during stage-racing. A standardized post-race questionnaire quantified nutrient intake and assessed 12 GI symptoms on a scale from 0 (no problem) to 9 (worst it has ever been) in each competition. RESULTS:: Mean CHO intake rates were not significantly different between IM Hawaii, IM GER and IM70.3 (62±26, 71±25 g/h and 65±25 g/h, respectively), but lower mean CHO intake rates were reported during CYCLE (53±22 g/h, p=0.044) and MARATHON (35±26 g/h; p<0.01). Prevalence of serious GI symptoms were highest during the IM races (∼31%; p=0.001) compared with IM70.3 (14%), CYCLE (4%), MARATHON (4%) and in PRO (7%), and correlated to a history of GI problems. In all data sets scores for upper and lower GI symptoms correlated with reported history of GI distress (r=0.37 and r=0.51, respectively; p<0.001). Total CHO intake rates were positively correlated with nausea and flatulence but negatively correlated with finishing time during both IM (r=-0.55 and r=-0.48; p<0.001). CONCLUSION:: The present study demonstrates that CHO intake rates vary greatly between events and individual athletes (6-136 g/h). High CHO intake during exercise was related to increased scores for nausea and flatulence, but also to better performance during IM races.
Beate Pfeiffer; Trent Stellingwerff; Adrian B Hodgson; Rebecca Randell; Klaus Pottgen; Peter Res; Asker E Jeukendrup
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-7-19
Journal Detail:
Title:  Medicine and science in sports and exercise     Volume:  -     ISSN:  1530-0315     ISO Abbreviation:  -     Publication Date:  2011 Jul 
Date Detail:
Created Date:  2011-7-21     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8005433     Medline TA:  Med Sci Sports Exerc     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
1School of Sport and Exercise Sciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT, United Kingdom, 2Nestlé Research Center, Lausanne, Switzerland, 3B.A.D. Gesundheitsvorsorge und Sicherheitstechnik GmbH Darmstadt, Germany, 4Department of Human Movement Sciences (NUTRIM), Maastricht University, Maastricht, the Netherlands.
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