article 2022 Prospective evaluation of cardiac effects of first-time marathon training, running, and recovery in middle-aged men: cohort study rationale and design I. Laily, T. G. H. Wiggers, N. van Steijn, E. Verhagen, A. J. Bakermans, H. T. Jorstad JournalNetherlands Heart JournalDOI10.1007/s12471-022-01708-5Study typecohort studyPopulationmiddle-aged men View on DOI ↗