Zone 2 is the easy, steady effort behind a strong aerobic base. Enter your age to see your estimated Zone 2 heart rate range.
No watch? In Zone 2 you can hold a conversation in full sentences, but you'd rather not sing. If you can only get out a few words at a time, ease off.
Zone 2 is low-to-moderate intensity, usually described as about 60–70% of maximum heart rate. It's sustainable for long periods and is widely used to build aerobic endurance with relatively little strain on recovery.
We estimate your maximum heart rate with the Tanaka formula (208 − 0.7 × age), then take 60–70% of it. It's the same method as our heart rate zones calculator, focused on this single zone.
For many people, especially when starting out, staying in Zone 2 means jogging slower or even walking uphill. That's normal — the pace at the same heart rate tends to improve over weeks of consistent training.
Quantum Khor is a wellness companion, not a medical device. It does not diagnose, treat or prevent any condition.