article 2026 10 pages Caffeine ingestion before exercise improves prolonged intermittent-sprint performance of team-sport athletes in normobaric hypoxia Wei Li, Zuojun Cao, Jie Chang, Ruiguo Xue, Jue Liu, Li Guo, Yinhang Cao, Olivier Girard JournalFrontiers in NutritionDOI10.3389/fnut.2025.1717009Publication typeOriginal ResearchPopulationteam-sport athletes View on DOI ↗