title: Authors' reply.
authors.affiliation: Department of Cardiology, Stadtspital Triemli, Zurich, Switzerland.
authors.forename: Annina A
authors.initials: AA
authors.lastname: Studer Bruengger
authors.affiliation: Department of Cardiology, University Hospital Basel, Basel, Switzerland.
authors.forename: Beat A
authors.initials: BA
authors.lastname: Kaufmann
authors.affiliation: Department of Cardiology, Stadtspital Triemli, Zurich, Switzerland.
authors.forename: Alain M
authors.initials: AM
authors.lastname: Bernheim
mesh_terms: D004452:Echocardiography / Q000379:methods*; D005080:Exercise Test / Q000379:methods*; D005260:Female; D006352:Heart Ventricles / Q000000981:diagnostic imaging*; D006801:Humans; D008297:Male; D010101:Oxygen Consumption / Q000502:physiology*; D010807:Physical Endurance / Q000502:physiology*; D010809:Physical Fitness / Q000502:physiology*; D016277:Ventricular Function, Left / Q000502:physiology*