title: The risks and benefits of exercise: do we have a finite number of heartbeats?
authors.affiliation: Division of Cardiology, Johns Hopkins School of Medicine, Baltimore, MD 21281-6568, USA.
authors.forename: K L
authors.initials: KL
authors.lastname: Baughman
mesh_terms: D015444:Exercise; D006321:Heart / Q000502:physiology*; D006801:Humans; D012307:Risk Factors