RT info:eu-repo/semantics/article T1 Relationship of carbohydrate intake during a single-stage one-day ultra-trail race with fatigue outcomes and gastrointestinal problems: A systematic review A1 Arribalzaga, Soledad A1 Viribay, Aitor A1 Calleja González, Julio A1 Fernández Lázaro, Diego A1 Castañeda Babarro, Arkaitz A1 Mielgo Ayuso, Juan Francisco K1 Marathon running K1 Running races K1 Runners (Sports) - Nutrition K1 Maratón K1 Carreras (Atletismo) K1 Athletes - Nutrition K1 Deportistas - Alimentación K1 Nutrition K1 Carbohydrates K1 Gastroenterology K1 Human physiology K1 32 Ciencias Médicas K1 3206 Ciencias de la Nutrición AB Due to the high metabolic and physical demands in single-stage one-day ultra-trail (SOUT) races, athletes should be properly prepared in both physical and nutritional aspects in order to delay fatigue and avoid associated difficulties. However, high carbohydrate (CHO) intake would seem to increase gastrointestinal (GI) problems. The main purpose of this systematic review was to evaluate CHO intake during SOUT events as well as its relationship with fatigue (in terms of internal exercise load, exercise-induced muscle damage (EIMD) and post-exercise recovery) and GI problems. A structured search was carried out in accordance with PRISMA guidelines in the following: Web of Science, Cochrane Library and Scopus databases up to 16 March 2021. After conducting the search and applying the inclusion/exclusion criteria, eight articles in total were included in this systematic review, in all of which CHO intake involved gels, energy bars and sports drinks. Two studies associated higher CHO consumption (120 g/h) with an improvement in internal exercise load. Likewise, these studies observed that SOUT runners whose intake was 120 g/h could benefit by limiting the EIMD observed by CK (creatine kinase), LDH (lactate dehydrogenase) and GOT (aspartate aminotransferase), and also improve recovery of high intensity running capacity 24 h after a trail marathon. In six studies, athletes had GI symptoms between 65–82%. In summary, most of the runners did not meet CHO intake standard recommendations for SOUT events (90 g/h), while athletes who consumed more CHO experienced a reduction in internal exercise load, limited EIMD and improvement in post-exercise recovery. Conversely, the GI symptoms were recurrent in SOUT athletes depending on altitude, environmental conditions and running speed. Therefore, a high CHO intake during SOUT events is important to delay fatigue and avoid GI complications, and to ensure high intake, it is necessary to implement intestinal training protocols. PB MDPI SN 1660-4601 YR 2021 FD 2021 LK https://uvadoc.uva.es/handle/10324/59750 UL https://uvadoc.uva.es/handle/10324/59750 LA eng NO International Journal of Environmental Research and Public Health, 2021, Vol. 18, Nº. 11, 5737 NO Producción Científica DS UVaDOC RD 21-dic-2024