Zone 2 Training: The Most Important Fitness Work You Are Probably Not Doing
Zone 2 training is the foundation of aerobic fitness and metabolic health. Most people either do not do it at all, or do not do it correctly.
Dejan Koceski
Health & Performance Coach · Melbourne
Zone 2 Training: The Most Important Fitness Work You Are Probably Not Doing
Zone 2 training is the foundation of aerobic fitness and long-term metabolic health.
Most people either do not do it at all, or train at an intensity that is far above zone 2 and wonder why their fitness is not improving.
What Zone 2 Is
Zone 2 refers to a specific heart rate zone — roughly 60–70% of your maximum heart rate — at which your body primarily uses fat as fuel and the cardiovascular adaptations are most powerful.
Practically: it is the intensity at which you can hold a full conversation. Comfortably. Not gasping between words — actually speaking in complete sentences.
For most untrained or moderately trained people, this feels almost too easy. That feeling is the point.
Why It Matters
Mitochondrial density. Zone 2 training increases the number and efficiency of mitochondria — the cellular engines that produce energy. More and better mitochondria means better energy production across all activities.
Metabolic flexibility. Training in zone 2 improves your ability to use fat as fuel — reducing reliance on carbohydrates and improving energy stability throughout the day.
Aerobic base. All higher-intensity performance is built on top of aerobic capacity. A larger aerobic base allows for better recovery between hard efforts.
Longevity. VO2 max is one of the strongest predictors of all-cause mortality. Zone 2 training is one of the most effective ways to improve it.
How Much To Do
The research suggests 150–200 minutes per week of zone 2 training as a meaningful health dose.
This can be running, cycling, swimming, rowing, or fast walking — any sustained aerobic activity at the right intensity.
The Discipline Of Slowing Down
For competitive, driven people — zone 2 training requires discipline. You have to resist the urge to push harder.
The adaptation comes from the volume at the right intensity — not from pushing through it.
Run with us at RUNVO Run Club. Explore the full training approach at Movement & Training.
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