base-data-manager/test/fixtures/fitbit-2026-02/FullHumanName/Sleep/Daily SpO2 README.txt

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Blood oxygen saturation (SpO2) estimates the amount of oxygen in your blood as a percentage of the maximum it could contain.
After a period of sleep, a single value is computed from all gathered data.
The "Daily SpO2" files contain the SpO2 values measured per day during sleep.
Values per row:
- timestamp: The time when the sleep period has ended
- average_value: The average SpO2 value computed during sleep
- lower_bound: Lower bound of SpO2 values
- upper_bound: Upper bound of SpO2 values