Effects of different exercise modalities on cardiac dysfunction in heart failure with preserved ejection fraction oleh David Bode, Natale P.L. Rolim, Tim Guthof, Niklas Hegemann, Paulina Wakula, Uwe Primessnig, Anne Marie Ormbostad Berre, Volker Adams, Ulrik Wisløff, Burkert M. Pieske, Frank R. Heinzel, Felix Hohendanner, OptimEx Study Group