RT Generic T1 Impact of Probiotics on the Performance of Endurance Athletes: A Systematic Review A1 Diaz-Jimenez, Jara A1 Sanchez-Sanchez, Eduardo A1 Ordonez, Francisco Javier A1 Rosety, Ignacio A1 Diaz, Antonio Jesus A1 Rosety-Rodriguez, Manuel A1 Rosety, Miguel Angel A1 Brenes, Francisco K1 athletic K1 athletic performance K1 endurance training K1 probiotics K1 URTIs K1 Lactobacillus-casei K1 Supplementation K1 Permeability K1 Inflammation K1 Infections K1 Sports AB Background: Probiotic supplements contain different strains of living microorganisms that promote the health of the host. These dietary supplements are increasingly being used by athletes to improve different aspects such as athletic performance, upper respiratory tract infections (URTIs), the immune system, oxidative stress, gastrointestinal (GI) problems, etc. This study aimed to identify the current evidence on the management of probiotics in endurance athletes and their relationship with sports performance. Methods: A systematic review of the last five years was carried out in PubMed, Scopus, Web of science, Sportdiscus and Embase databases. Results: Nine articles met the quality criteria. Of these, three reported direct benefits on sports performance. The remaining six articles found improvements in the reduction of oxidative stress, increased immune response and decreased incidence of URTIs. There is little scientific evidence on the direct relationship between the administration of probiotics in endurance athletes and sports performance. Conclusions: Benefits were found that probiotics could indirectly influence sports performance by improving other parameters such as the immune system, response to URTIs and decreased oxidative stress, as well as the monitoring of scheduled workouts. PB Mdpi YR 2021 FD 2021-11-01 LK https://hdl.handle.net/10668/25010 UL https://hdl.handle.net/10668/25010 LA en DS RISalud RD Apr 11, 2025