Endurance competitions over distances of 80‐160 km are required by Fédération Equestre Internationale (FEI) rules to be divided into a number of stages between three and six. These stages are also known as “loops”. Veterinary inspections, designed to ensure horse welfare, are conducted at the end of each loop, with details recorded on a separate “vet card” for each horse.

中文翻译：

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国际马术联合会耐力赛期间在兽医门口记录的临床参数与即将被淘汰的风险之间的关联

国际马术联合会 (FEI) 规则要求 80-160 公里的耐力赛分为三到六个阶段。这些阶段也称为“循环”。旨在确保马匹福利的兽医检查在每个循环结束时进行，每匹马的详细信息记录在单独的“兽医卡”上。