Int J Sports Med
DOI: 10.1055/a-1524-2095

The Athlete and Gut Microbiome: Short-chain Fatty Acids as Potential Ergogenic Aids for Exercise and Training

Tindaro Bongiovanni
1  Biomedical Sciences for Health, University of Milan, Milano, Italy
Marilyn Ong Li Yin
2  School of Health Sciences, Universiti Sains Malaysia,Minden, Malaysia
Liam Heaney
3  School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough, United Kingdom of Great Britain and Northern Ireland
› Author Affiliations


Short-chain fatty acids (SCFAs) are metabolites produced in the gut via microbial fermentation of dietary fibers referred to as microbiota-accessible carbohydrates (MACs). Acetate, propionate, and butyrate have been observed to regulate host dietary nutrient metabolism, energy balance, and local and systemic immune functions. In vitro and in vivo experiments have shown links between the presence of bacteria-derived SCFAs and host health through the blunting of inflammatory processes, as well as purported protection from the development of illness associated with respiratory infections. This bank of evidence suggests that SCFAs could be beneficial to enhance the athlete’s immunity, as well as act to improve exercise recovery via anti-inflammatory activity and to provide additional energy substrates for exercise performance. However, the mechanistic basis and applied evidence for these relationships in humans have yet to be fully established. In this narrative review, we explore the existing knowledge of SCFA synthesis and the functional importance of the gut microbiome composition to induce SCFA production. Further, changes in gut microbiota associated with exercise and various dietary MACs are described. Finally, we provide suggestions for future research and practical applications, including how these metabolites could be manipulated through dietary fiber intake to optimize immunity and energy metabolism.

Publication History

Received: 22 March 2021

Accepted: 26 May 2021

Publication Date:
13 July 2021 (online)

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