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 strategy 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.

本系统评价旨在研究补充绿茶对运动引起的氧化应激的影响。从成立到 2020 年 12 月检索了四个电子数据库：SPORTDiscuss、PubMed、Scopus 和 Web of Science。搜索策略以下列方式建立：（绿茶）（标题/摘要）AND（运动或训练）（标题/摘要）AND（氧化应激OR抗氧化剂OR氧化）（标题）。在应用纳入和排除标准 11 后，纳入随机或非随机对照试验，其中 6 项采用平行设计，5 项采用交叉设计。研究方法学质量采用 PEDro 量表进行评估，所有研究均被视为中等质量。总体而言，急性绿茶摄入似乎不会影响抗氧化状态或减少运动引起的氧化应激。相比之下，运动前补充绿茶超过 1 周，每天服用 400 至 800 毫克儿茶素，似乎能有效提高总抗氧化状态并保护细胞免受运动引起的氧化应激。未来的研究应集中在运动前 7 天以上开始补充绿茶，并在运动后 2 或 3 天完成，同时监测运动后 48-72 小时氧化应激标志物的变化。