article 2021 Estimation of anaerobic threshold by cardiac repolarization instability: a prospective validation study Dominik Schüttler, Simone Krammer, Lukas von Stülpnagel, Lauren Sams, Axel Bauer, Wolfgang Hamm, Stefan Brunner JournalBMC Sports Science, Medicine and RehabilitationDOI10.1186/s13102-021-00312-1Study typevalidation studyPopulationteam sports athletes View on DOI ↗