title: How hard should we exercise the failing human heart?
authors.forename: S J
authors.initials: SJ
authors.lastname: Keteyian
mesh_terms: D005081:Exercise Therapy / Q000379:methods*; D006339:Heart Rate; D006801:Humans; D018487:Ventricular Dysfunction, Left / Q000503:physiopathology / Q000534:rehabilitation*