Acute Exercise Does Not Change Gastric Emptying And Post-Prandial Lipemia In Men

Miriam Clegg, Conor McClean, Gareth Davison, Marie Murphy, Tom Trinick, Ellie Duly, JAD McLaughlin, Mark Fogarty, Amir Shafat

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

Exercise immediately prior to breakfast reduces post-prandial lipemia by 17% (Pertidou et al. 2004). Gastrointestinal transit is accelerated in chronically active males (Harris et al. 1991) and is a rate-limiting factor in the appearance of alimentary lipids in the blood. It remains to be determined if the reduction in post prandial lipemia is a result of changes in gastric emptying or post-absorptive factors in acute exercise.

PURPOSE: To determine whether acute moderate exercise will affect gastric emptying and post-prandial lipaemia.

METHODS: Eight healthy males (age 23.6±2.8yrs; height 181.4±8.1cm; weight 83.4±16.2kg; all data mean±SD) cycled at 60% predicted HRmax or rested for 1 hour, a week apart, then consumed a high-fat breakfast (68% of energy). Gastric emptying was measured using 13C-octanoic acid breath test and compared using a paired t-test. Blood samples obtained before and immediately after exercise and 2, 4 and 6 hours after eating were analysed for plasma triacylglycerol concentrations (2-way ANOVA).

RESULTS: There was no significant difference in gastric emptying half-time between exercise (208±98min) and rest conditions (238±137min, p=0.475). Serum Triacylglycerols were elevated 2 and 4 hours post-prandially (p
CONCLUSIONS: These data suggest that acute exercise before breakfast does not change gastric emptying of a high-fat meal or the appearance of lipids in the peripheral circulation.
Original languageEnglish
Pages (from-to)S460
JournalMedicine & Science in Sports & Exercise
Volume39
Issue number5
DOIs
Publication statusPublished - 1 May 2007

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