MOGLORD · WEB STORY

Your watch says VO2 max 42. Good or bad?

What the number measures, your age ranges, and how to move it.

THE MEANING

It's your oxygen ceiling

VO2 max = the most oxygen your body can use per minute at full effort, per kg of bodyweight.

WHY IT MATTERS

The strongest fitness marker

Higher VO2 max tracks with better endurance and, in large studies, lower all-cause mortality risk.

RANGES · 20S

Men in their 20s: ~43–52

Below 38 is low, mid-40s is solid, low-50s is excellent in your twenties. Elite runners hit 70+.

RANGES · 40S

Men in their 40s: ~39–48

The average slides about a point a year without training — training slows that slide a lot.

YOUR WATCH

Wrist estimates are ±5 points

Watches guess from heart rate and pace. Treat the number as a trend line, not a lab result.

MOVE IT · BASE

Mostly easy miles

80% of cardio at a pace where you can still talk. A bigger base raises the ceiling safely.

MOVE IT · TOP END

One interval day a week

4 × 4 minutes hard with 3 minutes easy between. The classic protocol for lifting VO2 max.

THE BOTTOM LINE

A number worth improving

Train the base, add one hard day, watch the trend. Estimate yours free with the VO2 max calculator.

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