Data model, fields and units

Data model, fields and units

Common questions about data model, fields and units.

Articles

Why are so many data fields null?Where do Garmin VO2 max and sleep score appear?Where do I find field definitions and enum values?Is the meal timestamp consumed time or logged time?Why is sleep duration shorter than the session window?Why doesn't activity end time equal start plus active seconds?What's the difference between resting and average HR in sleep?Can I get data in imperial units instead of metric?What units and scales do health and enrichment scores use?What is the difference between body and daily payloads?How do I build sleep stage charts from hypnogram samples?Why is a webhook field not in the documented schema?What's the difference between the three sleep scores?Does inactivity_seconds include sleep?What units is the sleep temperature delta in?Why isn't activity name one of the Terra activity enums?How does the net carbohydrates field work across providers?How do I explore the FHIR output format?Is the device-to-phone sync timestamp in the payload?What's in active durations and intensity buckets?Are activity payloads standardised across providers?Does Terra smooth samples, and why do array lengths differ?Are weight and body fat supported in body payloads?What is RR_INTERVAL and which devices stream speed?Why is a WHOOP activity mapped to the wrong type?Is visceral_fat_level a percentage?What does the timestamp_localization metadata field mean?