article 2021 High sleep quality can increase the performance of CrossFit ® athletes in highly technical‑ and cognitive‑demanding categories Kristina Klier, Selina Dörr, Annette Schmidt JournalBMC Sports Science, Medicine and RehabilitationDOI10.1186/s13102-021-00365-2Publication typeOriginal ResearchPopulationCrossFit athletes View on DOI ↗