article 2020 11 pages Longitudinal Analysis of Marathon Runners’ Psychological State and Its Relationship With Running Speed at Ventilatory Thresholds Eneko Larumbe-Zabala, Jonathan Esteve-Lanao, Claudia A. Cardona, Alberto Alcocer, Alessandro Quartiroli JournalFrontiers in PsychologyDOI10.3389/fpsyg.2020.00545Publication typeOriginal ResearchStudy typelongitudinal studyPopulationrecreational marathon runners View on DOI ↗