Zone 2 Cardio
Zone 2 cardio is low-intensity aerobic training at roughly 60–70% of your maximum heart rate, done to build an efficient aerobic base.
Published by Repit Fitness · Last updated
Key facts
- Easy, conversational-pace effort.
- Builds aerobic efficiency and endurance base.
- Improves the body's use of fat for fuel.
- Sustainable for long durations with low fatigue.
Zone 2 is the 'easy but purposeful' intensity that's become popular for endurance and health. You work at a pace you could hold for a long time while still able to talk — roughly 60–70% of max heart rate. It feels gentle, but done consistently it builds a powerful aerobic engine.
The appeal is that Zone 2 improves how efficiently your body produces energy and uses fat for fuel, strengthening your aerobic base with very little fatigue cost. That makes it easy to do in volume alongside strength training, and a strong base makes harder efforts (and recovery from them) better too.
Frequently asked questions
How do I know if I'm in Zone 2?
You should be able to hold a conversation but feel like you're working — roughly 60–70% of max heart rate. If you're gasping, you've gone too hard.
Why is Zone 2 cardio popular?
It builds aerobic efficiency and a strong endurance base with minimal fatigue, so you can do a lot of it without hurting recovery from strength training.
This article is general information, not medical advice. Talk to a doctor or registered dietitian before making changes if you have a health condition, are pregnant or take medication.
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