Investigating the Effect of a High Fat Meal and Prolonged Sitting on Executive Function: A Pilot Study [Astract only]

Paterson, Craig, Stone, Keeron J ORCID: 0000-0001-6572-7874, Stoner, Lee, Credeur, Daniel P., MartinezAguirre-Betolaza, Aitor, Festa, Joesph, Brown, Meghan A ORCID: 0000-0003-3260-977X, Parker, John K and Fryer, Simon M ORCID: 0000-0003-0376-0104 (2019) Investigating the Effect of a High Fat Meal and Prolonged Sitting on Executive Function: A Pilot Study [Astract only]. Medicine and Science in Sports and Exercise, 51 (6). p. 672. doi:10.1249/01.mss.0000562513.68051.35

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Prolonged periods of sitting have been shown to reduce cerebral blood flow and autoregulation, which may subsequently impair executive function. Similarly, the consumption of a high-fat diet can negatively impact cerebral perfusion. However, whether prolonged sitting combined with a high fat meal additionally impairs both executive function and cerebral perfusion is unknown. PURPOSE: To investigate the effects of consuming a high-fat meal followed by 3 hours of prolonged sitting on executive function and cerebral perfusion. METHODS: Five young healthy males (Age: 22.8 ± 2.9 yrs; stature 177.7 ± 6.4 cm; mass 78.9 ± 14.3 kg), from a target of 18, were recruited. Following familiarisation, participants completed two randomised sessions of 3 hours of prolonged sitting following the consumption of a high-fat (HF) and low-fat (LF) meal. Each visit was separated by a minimum of 2 and maximum of 7 days. Participants completed a Stroop test (containing both congruent and incongruent trials) and trail-making test (TMT) both pre- and post- sitting period. The TMT consists of two parts, A and B. Continuous wave near-infrared spectroscopy (cw-NIRS) was used to measure cerebral perfusion at AF4 both before (baseline) and throughout each trial. Data was analyzed using two-way repeated measures analysis of variance. Alpha was set at P < 0.1 a priori for preliminary analyses. RESULTS: There were no significant differences between or within trials for completion time for Stroop and TMT part A. Completion time for TMT part B was significantly (p = 0.078, d = 2.2) faster in the low-fat condition compared to HF condition (16.4 ± 4 s vs. 21.6 ± 0.7 s). There were no significant differences in cerebral perfusion between or within groups (p = 0.201). CONCLUSIONS: These preliminary findings suggest that the consumption of a high-fat meal may negatively impact core executive functions measured by TMT Part B, namely working memory and task-switching ability. However, cerebral perfusion, as measured by cw-NIRS, failed to identify a mechanism. This may be a consequence of limited statistical power given the sample size, or uncertainties regarding the sensitivity of cw-NIRS when measuring cerebral perfusion.

Item Type: Article
Article Type: Article
Additional Information: Conference paper abstract
Uncontrolled Keywords: Diet; Prolonged sitting; Task performance
Subjects: R Medicine > RA Public aspects of medicine > RA0421 Public health. Hygiene. Preventive Medicine
Divisions: Schools and Research Institutes > School of Education and Science
Research Priority Areas: Health, Life Sciences, Sport and Wellbeing
Depositing User: Susan Turner
Date Deposited: 26 Jul 2019 08:36
Last Modified: 31 Aug 2023 09:08

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