Cardiology · Sport and Exercise Medicine
Karvonen Target Heart Rate calculator
Enter the published formula inputs below to calculate and interpret this score.
Clinical inputs
Allowed range: 10–90 years
Allowed range: 40–120 bpm
Allowed range: 40–95 %
Result
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Clinical inputs
- Age (years)Accepted range: 10 to 90
- Resting heart rate (bpm)Accepted range: 40 to 120
- Intensity (% of heart rate reserve)Accepted range: 40 to 95
Primary source
Karvonen MJ, Kentala E, Mustala O. The effects of training on heart rate; a longitudinal study. Ann Med Exp Biol Fenn 1957;35(3):307-315. PMID 13470504. Target HR = resting HR + K × (peak HR − resting HR); Karvonen used peak HR measured on exercise testing and found the training threshold at 60% of heart rate reserve (as summarized in BCMJ, The science of exercise prescription: Martti Karvonen and his contributions). This calculator estimates peak HR as 220 − age. (1957)
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