Heart Rate Zones

Derives five Karvonen heart-rate training zones from age and resting heart rate for safe, targeted exercise intensity.

What you enter

• Age (yr)
• Resting heart rate (bpm)

Reference

Karvonen MJ, 1957

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All 63 clinical calculators

Educational decision-support tools. They do not replace clinical judgment, local protocols or specialist advice: verify results before acting on them.