VO2 Max
6-Minute Walk Test
Tips for Success
- You’ll need a heart rate monitor to complete this test. Use a fitness tracker or a free smartphone app, like Instant Heart Rate.
- Check and log your heart rate before you start walking.
Research and Results
This test estimates VO2 max in older adults or those with limited mobility. It’s most accurate for people with low to moderate fitness levels. For athletic individuals, it has a built-in ceiling effect: walking pace maxes out before your cardiovascular capacity does. As a result, this test may significantly underestimate your VO2 max if you are fit.
If you’re capable of running, we recommend using the Cooper Test (12-minute run) for a more accurate assessment.
12-Minute Run Test
Tips for Success:
- Choose a flat, straight surface like a running track.
- Warm up for 10 minutes with a jog or walk.
Common Reasons for Inaccurate Results:
- Biomechanical limitations
- Injuries
- Poor running/walking posture
- Lack of running/walking experience
- Poor footwear, uneven surface, inclined or declined track
Why Does VO2 Max Matter?
VO₂ max measures your body’s ability to use oxygen during intense exercise — a strong predictor of cardiovascular health and longevity.
About the Test:
Developed by Dr. Kenneth Cooper (1968), the 12-minute run test estimates aerobic fitness by measuring how far you can run in 12 minutes.
References
- Based on ACSM norms and Shvartz & Reibold (1990).
- Burr JF, Bredin SS, Faktor MD, Warburton DE. The 6-minute walk test as a predictor of VO2 max and exercise tolerance in cardiac patients. https://pubmed.ncbi.nlm.nih.gov/21131862/