Wearable AccuracyVo2 MaxCardio Fitness
Why Your Wearable's VO2 Max Estimate Is Probably Wrong (and What the Studies Actually Say)
Every running watch and fitness tracker claims to estimate your VO2 max. But the number on your wrist and the number from a gas exchange analyzer are different things. Here is what the validation studies actually measure, and why your wearable is probably off by 10 to 15 percent.
James HoffmannJun 14, 2026 · 1 min read
