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. 2021 Sep 7;12:719142. doi: 10.3389/fphys.2021.719142

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Copyright © 2021 Gaskell, Rauch and Costa.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Four-phase EIGS and GIS during exercise assessment and management procedures. Elemental sachets: carbohydrate (CHO) = 60 g, protein (Pro) = 20 g, Energy = 325 kcal, Fat = 0 g, Fibre < 1 g, FODMAP: < 1 g. Ax, assessment; GastroAxEx, gastrointestinal assessment during exercise; GIS, gastrointestinal symptoms; HR, heart rate; RPE, rating of perceived exertion; TCR, thermal comfort rating; T_re, rectal temperature. Intervention based on original research providing evidence of positive outcomes, and avoiding those showing evidence of neutral to negative outcomes, on markers of EIGS (e.g., functional, integrity, and systemic markers) and GIS during exercise (Costa et al., 2017b, 2020b). Adapted from Gaskell et al. (2021a), with permission.