The Effects of Exercise on Indirect Markers of Gut Damage and Permeability: A Systematic Review and Meta-analysis

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SYSTEMATIC REVIEW

The Effects of Exercise on Indirect Markers of Gut Damage and Permeability: A Systematic Review and Meta‑analysis Sarah Chantler1,2   · Alex Griffiths1 · Jamie Matu3 · Glen Davison4 · Ben Jones1,5,6,7,8 · Kevin Deighton1

© The Author(s) 2020

Abstract Aim  Exercise appears to cause damage to the endothelial lining of the human gastrointestinal tract and elicit a significant increase in gut permeability. Objective  The aim of this review was to determine the effect of an acute bout of exercise on gut damage and permeability outcomes in healthy populations using a meta-analysis. Methods  PubMed, The Cochrane Library as well as MEDLINE, SPORTDiscus and CINHAL, via EBSCOhost were searched through February 2019. Studies were selected that evaluated urinary (ratio of disaccharide/monosaccharide excretion) or plasma markers [intestinal Fatty Acid Binding Protein (i-FABP)] of gut permeability and gut cell damage in response to a single bout of exercise. Results  A total of 34 studies were included. A random-effects meta-analysis was performed, and showed a large and moderate effect size for markers of gut damage (i-FABP) (ES 0.81; 95% CI 0.63–0.98; n = 26; p