Zone 2 heart rate calculator
Turns your age and resting heart rate into training zones using the Karvonen method, with a ready Zone 2 range for aerobic base work.
Your ranges:
- 131–143Zone 2 (60–70% HRR)
- 143–156Zone 3 (70–80% HRR)
- 180HR max (Tanaka)
The formulas (Tanaka + Karvonen) are population estimates. Your real lactate threshold can differ by ±10 bpm — verify with a test if you can.
1 protocol, 1 study, 1 test — every week
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