What is a VO2 Max Test?
VO2 Max is a vital measure of both sports performance and overall health. Our test measures your maximum oxygen consumption during exercise, offering the gold-standard assessment of your cardiovascular fitness and aerobic capacity. At I-THRIVE, we provide accurate, lab-grade VO2 Max tests using specialised equipment to give you precise results tailored to your fitness and health goals.
Why Take a VO2 Max Test
VO2 Max and Performance
- Higher VO2 Max = Competitive Edge: Athletes with higher VO2 Max levels can sustain greater intensities for longer durations.
- Endurance Efficiency: It determines how efficiently your body converts oxygen into energy, directly impacting stamina and output.
Who Should Take a VO2 Max Test?
VO2 Max testing is ideal for:
- Athletes: Optimise performance and tailor training for endurance sports including fuel utilisation planning for long-duration or high-intensity workouts
- Fitness Enthusiasts: Gain insights into your cardiovascular fitness and set measurable goals.
- Longevity Seekers: Monitor your VO2 Max to maintain vitality as you age.
The Decline of VO2 Max with Age
VO2 Max naturally declines by around 1% per year after age 30. Left unchecked, this can result in a 30-40% reduction by age 70, with severe consequences:
- Reduced Cardiovascular Fitness: Everyday tasks become exhausting as oxygen delivery efficiency diminishes.
- Loss of Independence: Falling below a VO2 Max of 15-18 mL/kg/min can make basic activities difficult.
- Increased Disease Risk: Lower VO2 Max is linked to higher rates of cardiovascular disease, diabetes, and mortality.
- Decreased Longevity: VO2 Max is a strong predictor of lifespan, with higher levels correlating to better health outcomes.
Monitoring and improving VO2 Max supports not only athletic performance but also long-term vitality, ensuring both peak performance in the present and a healthier, more independent future.

Test Protocol
Preparation
- Test Readiness Questionnaire: Prior to test day to assess suitability, define the test endpoint (max effort or anaerobic threshold), and choose between a treadmill or Wattbike.
- Avoid intense exercise 24-48 hours before the test.
- Equipment Setup: We’ll fit you with a mask to capture exhaled air and attach monitors to track your heart rate.
Warm-Up
- Perform 5-10 minutes of low-intensity activity (e.g., walking, light cycling) to prepare for the test.
Testing Phase
- Starting Point: Begin at a manageable intensity (walking, jogging, or cycling with low resistance).
- Incremental Increases:
- On the treadmill: Increase speed or incline every 1-3 minutes.
- On the Wattbike: Gradually increase resistance or cadence in stages.
- Continuous Monitoring: Track oxygen consumption (VO2), carbon dioxide production (VCO2), heart rate, and perceived exertion throughout.
Stopping Points
- Submaximal Test (Anaerobic Threshold):
- The test stops when the anaerobic threshold (AT) is reached.
- AT represents the highest sustainable exercise intensity before fatigue impairs performance.
- Maximal Test: Continue to volitional exhaustion or physiological max effort.
Cool-Down
- Perform 5-10 minutes of light activity to gradually reduce heart rate and blood pressure.
Results and Insights
Participants receive a detailed report, including:
- VO2 Max (or VO2 at AT): Oxygen consumption at maximum or threshold effort.
- Heart Rate Zones: For targeted training and recovery.
- Fuel Utilization: Ratio of fat to carbohydrates burned at different intensities.
- Training Guidance: Optimal workout intensity and duration based on results.
As part of your appointment, we will walk you through your results, providing personalised recommendations and actionable steps to help you achieve meaningful improvements.
FAQ
How long does a VO2 Max Test take?
- The total appointment will be about 1 hour. The main exercise component of the test is typically 15-20 minutes in duration
How should I prepare for the test?
- For best results, avoid food, tobacco, alcohol, and caffeine for at least 3 hours before testing.
- Wear comfortable exercise clothing suitable for treadmill or bike exercise.
How often should I take a MaxVO2 test?
- It’s recommended to retest every 6-12 months or after significant changes in training, fitness level, or body composition.
Should I take the test on the treadmill or exercise bike?
- Choose the equipment that aligns with your primary sport or activity for the most relevant and actionable results. If unsure, contact us and we can help you decide.
- Treadmill: Best for runners, walkers, or weight-bearing activities; offers higher VO2 results but involves more joint impact.
- Exercise Bike: Ideal for cyclists, triathletes, or low-impact training; better for those with joint concerns or injuries.
Is the test suitable for beginners?
- We don’t recommend that beginners progress all the way to maximum exhaustion. Choosing the submaximal stopping point may be more appropriate for beginners. Alternatively, you could consider the FatMax test.
Can I do both a bike and treadmill Max VO2 test if I am a triathlete?
- Yes, triathletes can benefit from doing both tests. A bike test provides cycling-specific data, while a treadmill test assesses running performance. Combining results helps tailor training zones and fuelling strategies for both disciplines, optimizing overall triathlon performance.
- We recommend waiting at least 48-72 hours between tests to allow adequate recovery, especially if performing at maximum effort. This ensures accurate results and avoids fatigue impacting your performance on the second test.
- What are the differences & similarities between Max VO2, FatMax, and Lactate Tests?
Aspect | Lactate Threshold | FatMax | Max VO2 |
---|---|---|---|
Purpose | Identifies the intensity where lactate starts to accumulate faster than it can be cleared. | Determines the intensity where fat burning is maximised. | Measures the maximum oxygen your body can use during exercise. |
Key Reasons for Test | Optimise endurance performance and delay fatigue. | Assess fat-burning efficiency. | Assess aerobic fitness and overall cardiovascular performance limits. |
Primary Metric | Blood lactate levels vs. exercise intensity | Fat-to-carbohydrate fuel utilization ratio | VO2 (oxygen uptake) and VCO2 (CO2 output) |
Outcome | Optimise training zones to delay fatigue and improve endurance. | Identify heart rate zones for fat loss and energy efficiency. | Assess aerobic capacity and overall cardiovascular fitness. |
- Each test provides valuable, specific insights, but combining them creates a holistic view of aerobic fitness, energy efficiency, and performance thresholds, allowing for highly targeted training and nutrition strategies.