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cardio fitness articles
3 articles on cardio fitness, newest first. Every one is sourced and links to the calculator it applies to.
How Garmin Calculates Your VO2 Max (and How Accurate It Is)
Garmin's Firstbeat algorithm reads pace against heart rate in short credible segments. Within 3-5 ml/kg/min of a lab with a chest strap, worse without.
How Fitbit Calculates Your VO2 Max (Cardio Fitness Score)
If Fitbit shows you a range like 42-46 instead of a number, it has estimated your VO2 max from resting heart rate alone. Here is how to get a real one.
How Apple Watch Calculates VO2 Max (Cardio Fitness)
Apple's Cardio Fitness is the one wearable VO2 max estimate with published independent validation. It underestimates, by about 6.9 ml/kg/min on average.