← Back
Heart Rate Zones
Karvonen zones from age + resting HR.
Estimated max HR190 bpm
Zone 1 (50–60%)125–138 bpm
Zone 2 (60–70%)138–151 bpm
Zone 3 (70–80%)151–164 bpm
Zone 4 (80–90%)164–177 bpm
Zone 5 (90–100%)177–190 bpm
Karvonen zones from age + resting HR.