VO2 Max Is the Number Your Doctor Should Be Testing

Ask a man his bench press and he knows within five kilos. Ask him his VO2 max and you get a shrug. That gap is one of the strangest blind spots in men’s health, because aerobic capacity is the strongest single predictor of how long you will live that we can measure outside a hospital.

Each 1-MET increase in cardiorespiratory fitness is associated with roughly a 13 percent reduction in all-cause mortality. Moving from the bottom quartile of fitness to the second quartile cuts mortality risk more than quitting smoking does in most cohorts.

The field test that actually works

• Warm up 10 minutes easy, then run or cycle hard for 5 minutes and note the distance.
• Rest 10 minutes, then repeat the 5-minute effort and average the two distances.
• Enter distance into the Cooper formula: VO2 max ≈ (distance in metres − 504.9) ÷ 44.73.
• Retest every eight weeks under identical conditions — same surface, same time of day, same caffeine status.

Fitness is not a vanity metric. It is the most modifiable vital sign we have, and almost nobody measures it.

— Dr. Elena Vasquez

What "good" looks like by decade

• 30s: 45–52 ml/kg/min puts you in the top quartile.
• 40s: 41–47 is genuinely strong.
• 50s: 36–42 is the target zone.
• 60s: 31–37 keeps you functionally younger than your birth certificate.

None of this requires a marathon. It requires two hard intervals a week and a long easy session that you treat as non-negotiable. That is the entire prescription, and it is worth more than the rest of the supplement aisle combined.