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Glossary · Health metric

HRV (Heart Rate Variability)

Definition

The variation in the time between consecutive heartbeats, measured in milliseconds. Higher HRV generally indicates better autonomic nervous system balance and recovery; lower HRV can signal stress, fatigue, or under-recovery. Premium fitness wearables (WHOOP, Oura, Garmin, Apple Watch Series 6+) measure HRV continuously.

A person checking a recovery and heart-rate screen after training.

How MoveTogether uses it.

MoveTogether does not score competitions on HRV. HRV depends heavily on individual physiology, sleep, training history, and stress, comparing HRVs across people doesn't produce a meaningful leaderboard. We score on activity output (calories, minutes, steps, workouts), which is fair to compare across users.

Your HRV lives in your wearable's app (WHOOP, Oura, Garmin Connect, Health on iPhone), which is where you should read it. MoveTogether does request HRV from Apple Health, and it is registered with the background sync service, so it does leave your device. What it does not do is affect scoring: no competition or league standing is computed from it. Inside the app it surfaces only on the Data Sources screen in Settings, which counts how many apps and devices write each metric.

This comes up often enough to be worth stating plainly: HRV is a recovery signal, not an output signal. It tells you something about how ready you are, and it moves for reasons that have nothing to do with what you did, including alcohol, illness, a poor night's sleep, altitude and where you are in your cycle. Two people with identical training can sit thirty milliseconds apart and both be perfectly healthy. A leaderboard needs a number where higher reliably means someone did more. HRV is not that number. Calories, minutes, steps and workouts are, which is why they carry the scoring.

Related terms

VO2 MaxThe 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).Workout BasedA MoveTogether competition scoring method that counts only logged or auto-detected workouts, not all-day passive activity.
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See hrv (heart rate variability) in action.

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