Cardiology · Sports Medicine
Heart Rate Reserve calculator
Enter the published formula inputs below to calculate and interpret this score.
Clinical inputs
Result
Complete all required inputs to calculate the score.
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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