RT Journal Article T1 Regular, but not acute, green tea supplementation increases total antioxidant status and reduces exercise-induced oxidative stress: a systematic review A1 Rojano Ortega, Daniel K1 Green tea K1 Oxidative stress K1 Antioxidants K1 Catechins K1 Exercise AB This systematic review aims to investigate the effects of green tea supplementation on exercise-induced oxidative stress. Four electronic databases were searched from inception to December 2020: SPORTDiscuss, PubMed, Scopus, and Web of Science. The search strat- egy was established in the following manner: (green tea) (Title/Abstract) AND (exercise OR training) (Title/Abstract) AND (oxidative stress OR antioxidant OR oxidation) (Title). After the application of inclusion and exclusion criteria 11, randomized or non randomized control trials were included, 6 with a parallel design and 5 with a crossover design. Study methodological quality was assessed with the PEDro scale, and all studies were considered of moderate quality. Overall, acute green tea ingestion does not appear to influence antioxidant status or reduce exercise-induced oxidative stress. In contrast, green tea supplementation before exercise, for periods of more than 1 week, in a dose range of 400 to 800 mg of catechins per day, appears to be efficacious to increase total antioxidant status and protect cells against exercise-induced oxidative stress. Future investigations should focus on beginning green tea supplementation more than 7 days before exercise and completing it 2 or 3 days after while monitoring the change of markers of oxidative stress up to 48 72 h after exercise. PB Elsevier YR 2021 FD 2021 LK http://hdl.handle.net/10433/14303 UL http://hdl.handle.net/10433/14303 LA en NO Nutrition Research, vol 94, p. 34-43 NO Universidad Pablo de Olavide. Departamento: Deporte e Informática. DS RIO RD May 10, 2026