VO2 Max: The Oxygen Metric That Could Predict How Long You Live

A steady hike up Table Mountain, breathing crisp Cape Town air without gasping for it, depends on something measurable: how well your body takes in and uses oxygen.

The number behind it is your VO2 max.

At Expand Health we track VO2 max as a measurable indicator of healthspan and longevity. It reflects how efficiently your body uses oxygen, which in turn depends on your cardiovascular, respiratory and metabolic health.

What is VO2 Max?

VO2 max stands for maximal oxygen uptake. It measures the highest amount of oxygen your body can utilise during intense physical activity. It reflects how well your heart, lungs, muscles and mitochondria work together to take in, transport and use oxygen.

A higher VO2 max means more oxygen reaches your cells, supporting better endurance, brain function, immunity, and cellular repair. A lower VO2 max can signal declining aerobic fitness and is now recognised as a strong independent predictor of mortality.

VO2 Max and Longevity: What the Science Says

The main findings:

• A study published in JAMA Network Open in 2018 found that "cardiorespiratory fitness, measured by VO2 max, was directly associated with decreased mortality risk." The fittest individuals had up to five times lower risk of all-cause mortality compared to those with the lowest VO2 max.
• Circulation (2021) highlighted that even small improvements in VO2 max are linked with significant reductions in cardiovascular events and longer lifespan.
• Another 2023 study confirmed VO2 max as a more powerful predictor of death than smoking, high cholesterol or hypertension.

Across these studies the pattern holds: the higher the VO2 max, the lower the risk of death.

How is VO2 Max Tested?

At Expand Health, we offer clinically supervised VO2 max testing using graded exercise protocols to determine your oxygen uptake threshold. The test is safe and non-invasive. The results give you personalised insight into your aerobic capacity, recovery ability and biological age markers.

From those results we design tailored protocols to elevate your VO2 max over time, improving both healthspan and performance.

How to Improve Your VO2 Max

1. Aerobic & High-Intensity Interval Training (HIIT)

Regular cardiovascular training is one of the most effective ways to increase VO2 max. This includes:

• Zone 2 aerobic training (60-70% max heart rate): boosts mitochondrial density
• HIIT: short bursts of near-maximal effort improve cardiac output and oxygen utilisation

2. Hyperbaric Oxygen Therapy (HBOT)

At Expand Health, HBOT is part of our longevity protocol. Inside a pressurised chamber, you breathe 100% oxygen at up to 2.5x atmospheric pressure, which raises the oxygen carried in your plasma and tissues.

• HBOT has been shown to enhance mitochondrial function, promote angiogenesis, and increase aerobic capacity over time
• A pilot study published in Physiological Reports (2021) showed VO2 max improvement after a series of HBOT sessions in healthy adults

3. PEMF Therapy (Pulsed Electromagnetic Field Therapy)

PEMF uses electromagnetic fields to stimulate cellular repair, circulation, and mitochondrial activity, indirectly improving oxygen efficiency.

• Studies indicate PEMF enhances muscle recovery and capillary oxygen delivery, contributing to improved aerobic performance

4. Lifestyle Factors that Boost VO2 Max

• Sleep: Deep sleep is essential for recovery and cardiac efficiency
• Nutrition: A diet rich in antioxidants (polyphenols, omega-3s, nitric oxide boosters) supports endothelial function and oxygen transport
• Stress management: Chronic stress impairs oxygen utilisation and heart rate variability

Why VO2 Max is a Core Metric at Expand Health

We believe longevity is measurable, and VO2 max is one of the key indicators we use to track progress.

Whether you're a weekend cyclist or an executive managing fatigue, the number responds to training.

At Expand Health in De Waterkant we offer clinical VO2 max testing, alongside personalised protocols and integrative oxygen-based therapies for raising the number.