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So Whoop's strain is on a scale from 0 to 21, and it's personalized based on your history and your health.
Fitbit's cardio load, it doesn't really seem to have a cap, but it's basically measuring how elevated your heart rate gets from normal and for how long.
So once the AI coach like gets to know you well enough, it knows what that normal is.
Listen to native speakers pronounce “Fitbit” in real conversational contexts with synchronized timestamps and subtitles.