Cardiology · Sports Medicine
Heart Rate Reserve calculator
Enter the published formula inputs below to calculate and interpret this score.
Clinical inputs
Result
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Formula inputs
- Hrr Age Years (years)Accepted range: 10 to 90
- Hrr Resting Hr (bpm)Accepted range: 40 to 120
Primary source
Karvonen MJ et al. The effects of training on heart rate. Ann Med Exp Biol Fenn. DOI: 10.1080/00365521.1957.11812784. PMID: 13426654. Scope: Heart rate reserve = estimated HRmax (220 − age) − resting heart rate. (1957)
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