Glossary · Health metric
VO2 Max
Definition
The maximum amount of oxygen your body can use during intense exercise, measured in milliliters of oxygen per kilogram of body weight per minute (mL/kg/min). It's widely considered the best single number for aerobic fitness. Apple Watch, Garmin, and WHOOP all estimate VO2 max from heart rate during cardio.
How MoveTogether uses it.
MoveTogether does not score competitions on VO2 max. Like HRV, it's a personal physiology metric that depends on body composition, training history, and genetics, comparing absolute VO2 maxes across people would heavily favor lean cardio athletes regardless of effort. Effort scoring (calories, minutes, workouts) is the fair comparison.
If you care about VO2 max, Garmin Connect, Apple Health, and WHOOP are where to track it. MoveTogether does not request VO2 max from Apple Health at all. It was in the permission set until August 2026, prompted for and uploaded without any feature consuming it, and was removed for that reason.
There is a second reason beyond fairness: VO2 max on a consumer wearable is an estimate rather than a measurement. A lab test involves a mask and a treadmill. A watch infers the figure from heart rate against pace, which means it generally needs outdoor runs with GPS before it will update at all. Cyclists, swimmers and lifters can train hard for months and watch the number sit perfectly still. Scoring on it would reward one training style and one data-collection pattern rather than effort. As a long-term trend line for yourself it is genuinely useful, which is why it belongs in your wearable's own app.
See vo2 max in action.
MoveTogether is free on the App Store. Connect a wearable (or just your iPhone) and start your first competition this week.
