title: Ask the doctor. I try to exercise every day to raise my heart rate. The standard formula of 220 minus age (I'm 79) times 0.9 gives an excessively high target for me. Because my resting heart rate is under 50, I would need to more than double my heart rate to reach a target of 128. Does the standard formula apply to people like me?
authors.forename: Thomas H
authors.initials: TH
authors.lastname: Lee
mesh_terms: D000368:Aged; D002318:Cardiovascular Diseases / Q000517:prevention & control*; D015444:Exercise / Q000502:physiology*; D017408:Guidelines as Topic; D006339:Heart Rate / Q000502:physiology*; D006801:Humans; D005082:Physical Exertion; D010809:Physical Fitness