The impact of a 48-hour high-carbohydrate diet with high or low FODMAP content, before endurance exercise on gastrointestinal motility and symptoms, and exercise performance
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Authors
Scrivin, Rachel
Costa, Ricardo J. S.
Slater, Gary
Mika, Alice
Rauch, Christopher
Young, Pascale
Costa, Ricardo J. S.
Slater, Gary
Mika, Alice
Rauch, Christopher
Young, Pascale
Author ORCID Profiles (clickable)
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Grantor
Date
2023
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Type
Conference Contribution - Paper in Published Proceedings
Ngā Upoko Tukutuku (Māori subject headings)
Keyword
Abstract
FODMAPs
Carbohydrate loading
Gastrointestinal symptoms
GIS
Gastrointestinal motility
Exercise performance
FODMAPs
Carbohydrate loading
Gastrointestinal symptoms
GIS
Gastrointestinal motility
Exercise performance
ANZSRC Field of Research Code (2020)
Citation
Scrivin, R. A., Costa, R. J. S., Slater, G., Mika, A., Rauch, C., & Young, P. (2023, Canada). The impact of a 48-hour high-carbohydrate diet with high or low FODMAP content, before endurance exercise on gastrointestinal motility and symptoms, and exercise performance [Poster presentation]. CASEM 2023, Fairmont Banff Springs, Banff, Alberta, Canada. https://casem-acmse.org/annual_symposium/banff2023/
Abstract
OBJECTIVE: To determine the effects of a 48-hour, high carbohydrate, high-fermentable oligosaccharide, disaccharide, monosaccharide, and polyol (FODMAP) (HCHF) or high-carbohydrate low-FODMAP (HCLF) diet on gastrointestinal motility and symptoms in response to endurance exercise, and subsequent exercise performance.
STUDY DESIGN: Randomized, double-blind, crossover trial.
SUBJECTS: Twelve (n 5 10 male and n 5 2 female) recreationally competitive endurance runners [mean (SD): age 42 (5) years, height 1.74 (0.08) m, body mass 72.1 (13.7) kg, fat mass 20 (8)%, and V̇ O2max 53.2 (8.6) mL/kg/min] with preexisting, recurrent, exercise-associated gastrointestinal symptoms (GIS) volunteered to participate.
INTERVENTION: Participants were randomly assigned to a 48-hour high-carbohydrate (10-12 g/kg/d) high-FODMAP (50-60 g/d) (HCHF) and a high-carbohydrate low-FODMAP (2-3 g/d) (LCLF) intervention, with a 7-day washout between the trials. After the dietary intervention, participants completed 2-hour steady-state running at 60% V̇ O2max, followed by a 1-hour distance test, in temperate ambient conditions (23°C, 49% RH). Maltodextrin (10 g at 10% wt/ vol) was provided every 20 minutes during steady state, plus water provided ad libitum during the entire 3 hours. A 150- mL solution containing 20 g of lactulose was provided 30 minutes into the distance test to determine orocecal transit time (OCTT).
OUTCOME MEASURES: Preexercise and postexercise breath samples breath hydrogen (H2) were collected, and Ex-GIS and rectal temperature (Tre), were measured. Every 15 minutes during steady-state exercise, HR, RPE, and Ex-GIS were recorded. During the distance test, the distance completed was recorded every 5 minutes, plus HR and RPE every 15 minutes. Breath samples were collected every 15 minutes during the 3-hour recovery. Breath samples were analyzed for hydrogen
(H2) to determine OCTT.
RESULTS: OCTT did not significantly differ between HCHF 83 (58) minutes and HCLF 95 (55) minutes (P 5 0.59). Greater total-GIS were reported preexercise (P 5 0.04) and during (p 5 0.02) steady state on HCHF; however, greater total-GIS were reported at the 1-hour to 2-hour recovery period on HCLF (P 5 0.04). There was no difference in measured HR, RPE, or Tre between the trials. Distance completed was 9.9 (1.7) km and 10.0 (1.6) km on HCHF and HCLF (P 5 0.33), respectively.
CONCLUSIONS: A 48-hour HCHF diet before endurance running leads to greater GIS before and during exercise; however, this does not impact exercise strain, gastrointestinal motility, or exercise performance. Greater GIS in the 1-hour to 2-hour recovery period with the HCLF trial requires further investigation.