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Fitbit Daily Data Export Format

  • Updated

The Fitbit Daily Data export contains a daily summary of a variety of Fitbit data. Each entry contains the data for a single participant on a single day.

The data in the Fitbit export is obtained through the Fitbit API. The available data will vary based on the device capabilities and the user's privacy settings. See the Fitbit "Get Daily Activity Summary" documentation for more information about using and interpreting Fitbit data. The Daily Data export includes data from several different API sources, as described in the table below.

Table of Contents

Data Fields

Field Description
ActivityCalories Calories burned from periods above sedentary level, from the Activity Time Series.
BodyBmi Body Mass Index
BodyFat Body fat
BodyFatLog Unused, see Fitbit Body Weight Log Export Format.
BodyFatLogSource Unused, see Fitbit Body Weight Log Export Format.
BodyWeight Body weight, in kilograms
BodyWeightLogBodyWeight Unused, see Fitbit Body Weight Log Export Format.
BodyWeightLogBMI Unused, see Fitbit Body Weight Log Export Format.
BodyWeightLogFat Unused, see Fitbit Body Weight Log Export Format.
BodyWeightLogSource Unused, see Fitbit Body Weight Log Export Format.
BreathingRate Average number of breaths taken per minute from the previous night's sleep.
Calories Calories
CaloriesBMR Only BMR (Basal Metabolic Rate) calories
CardioScore Score that shows how fit participants are for their age and sex. Estimate of VO2 max. Score is based on resting heart rate and user profile. The value can be either a single number (45) or a range (44-48).
Date The date of the measurement, in ISO 8601 format.
Distance Distance traveled, in kilometers
Elevation Elevation traveled, in meters
Floors Floors climbed
FoodCaloriesIn Food calories in
HeartRateIntradayCount

The number of intraday heart rate samples collected during the time period.

The sampling interval is normally 5-15 seconds, but it can be as short as 1-3 seconds while the user is recording an activity, so this figure is highly variable from day to day.
HeartRateIntradayMinuteCount

The number of minutes throughout the day that have an intraday heart rate sample. This value approximates the time the device was worn. A value of 1439 or greater indicates a full day.

HeartRateZoneCardioCaloriesOut

HeartRateZoneCardioMax

HeartRateZoneCardioMin

HeartRateZoneCardioMinutes

Fat burn, cardio, and peak are the three heart rate zones. They are personalized to each participant based on age and cardiovascular fitness level. To engage the cardio zone, participants may be running or biking.

  • Number of calories burned while in cardio zone.
  • A minimum and maximum heart rate that together define the cardio zone. For example: HeartRateZoneCardioMin of 94 and HeartRateZoneCardioMax of 132 mean that the cardio zone includes heart rates from 94-132.
  • Number of minutes spent in cardio zone.

HeartRateZoneFatBurnCaloriesOut

HeartRateZoneFatBurnMax

HeartRateZoneFatBurnMin

HeartRateZoneFatBurnMinutes

Fat burn, cardio, and peak are the three heart rate zones. They are personalized to each participant based on age and cardiovascular fitness level. To engage the fat burn zone, participants may be lifting weights, taking a yoga class, or going on a fast walk.

  • Number of calories burned while in fat burn zone.
  • A minimum and maximum heart rate that together define the fat burn zone. For example: HeartRateZoneFatBurnMin of 94 and HeartRateZoneFatBurnMax of 132 mean that the fat burn zone includes heart rates from 94-132.
  • Number of minutes spent in fat burn zone.

HeartRateZoneOutOfRangeCaloriesOut

HeartRateZoneOutOfRangeMax

HeartRateZoneOutOfRangeMin

HeartRateZoneOutOfRangeMinutes

Heart rate zones go in terms of intensity from peak to cardio to fat burn. Out of range zone means a participant fell below the threshold of fat burn zone. Zones are personalized to each participant based on age and cardiovascular fitness level.

  • Number of calories burned while out of range.
  • A minimum and maximum heart rate that together define the out of range zone. For example: HeartRateZoneOutofRangeMin of 94 and HeartRateZoneOutofRangeMax of 132 mean that the out of range zone includes heart rates from 94-132.
  • Number of minutes spent out of range.

HeartRateZonePeakCaloriesOut

HeartRateZonePeakMin

HeartRateZonePeakMax

HeartRateZonePeakMinutes

Fat burn, cardio, and peak are the three heart rate zones. They are personalized to each participant based on age and cardiovascular fitness level. To engage the peak zone, participants may be sprinting or biking up a steep hill at a fast pace.

  • Number of calories burned while in peak zone.
  • A minimum and maximum heart rate that together define the peak zone. For example: HeartRateZonePeakMin of 94 and HeartRateZonePeakMax of 132 mean that the peak zone includes heart rates from 94-132.
  • Number of minutes spent in peak zone.
HrvDailyRmssd The Root Mean Square of Successive Differences (RMSSD) between heart beats. It measures short-term variability in the user’s daily heart rate in milliseconds (ms).
HrvDeepRmssd The Root Mean Square of Successive Differences (RMSSD) between heart beats. It measures short-term variability in the user’s heart rate while in deep sleep, in milliseconds (ms).

MinutesFairlyActive

MinutesLightlyActive

MinutesSedentary

MinutesVeryActive

 Minutes spent at different activity levels
ModifiedDate The date the data was last modified, in ISO 8601 format.
ParticipantIdentifier The MyDataHelps Designer identifier of the participant associated with the Fitbit user. Can be used to cross reference with Participants.

ParticipantID

 The stable, automatically generated, internal system identifier for this participant. Universally unique identifier (UUID).

RestingHeartRate

 Average resting heart rate.
SpO2Avg The mean of the 1 minute SpO2 levels calculated as a percentage value from the previous night's sleep.
SpO2Max The maximum daily SpO2 level calculated as a percentage value from the previous night's sleep. 
SpO2Min The minimum daily SpO2 level calculated as a percentage value from the previous night's sleep.

Steps

 Steps taken
TempCore Unused
TempSkin Skin temperature is the temperature on the skin's surface. It typically varies more than core temperature, since warming up or cooling down the skin is one way the body regulates itself and keeps core temperature stable. The temperature value is in degrees Celsius.
TempSkinLogType The type of skin temperature log created, which will be either dedicated_temp_sensor for watches that have an actual temperature sensor or other_sensors for devices that approximate the temperature based on other sensors.
TrackerActivityCalories Calories burned from periods above sedentary level; only includes tracker sources, not manually-entered data.
TrackerCalories Calories; only includes tracker sources, not manually-entered data.
TrackerDistance Distance traveled, in kilometers; only includes tracker sources, not manually-entered data.
TrackerElevation Elevation traveled, in meters; only includes tracker sources, not manually-entered data.
TrackerFloors Floors climbed; only includes tracker sources, not manually-entered data.

TrackerMinutesFairlyActive

TrackerMinutesLightlyActive

TrackerMinutesSedentary

TrackerMinutesVeryActive

 Minutes spent at the different activity levels; only includes tracker sources, not manually-entered data.
TrackerSteps Steps taken; only includes tracker sources, not manually-entered data.
Water Water intake, in milliliters.

Sample CSV Export

ParticipantIdentifier,Date,ActivityCalories,BodyBmi,BodyFat,BodyFatLog,BodyFatLogSource,BodyWeight,BodyWeightLogBodyWeight,BodyWeightLogBMI,BodyWeightLogFat,BodyWeightLogSource,Calories,CaloriesBMR,Distance,Elevation,Floors,FoodCaloriesIn,HeartRateIntradayCount,HeartRateZoneOutOfRangeCaloriesOut,HeartRateZoneOutOfRangeMax,HeartRateZoneOutOfRangeMin,HeartRateZoneOutOfRangeMinutes,HeartRateZoneFatBurnCaloriesOut,HeartRateZoneFatBurnMax,HeartRateZoneFatBurnMin,HeartRateZoneFatBurnMinutes,HeartRateZoneCardioCaloriesOut,HeartRateZoneCardioMax,HeartRateZoneCardioMin,HeartRateZoneCardioMinutes,HeartRateZonePeakCaloriesOut,HeartRateZonePeakMax,HeartRateZonePeakMin,HeartRateZonePeakMinutes,MinutesFairlyActive,MinutesLightlyActive,MinutesSedentary,MinutesVeryActive,RestingHeartRate,Steps,TrackerActivityCalories,TrackerCalories,TrackerDistance,TrackerElevation,TrackerFloors,TrackerMinutesFairlyActive,TrackerMinutesLightlyActive,TrackerMinutesSedentary,TrackerMinutesVeryActive,TrackerSteps,Water,ModifiedDate,HeartRateIntradayMinuteCount,BreathingRate,HrvDailyRmssd,HrvDeepRmssd,SpO2Avg,SpO2Min,SpO2Max,CardioScore,TempCore,TempSkin,TempSkinLogType
aaaa-bbbb-cccc-dddd,2020-03-24T00:00:00,,,,,,,,,,,1892,,,,,,,,85,30,,,119,85,,,144,119,,,220,144,,,,,,,,,,,,,,,,,,,2020-04-01T21:23:49Z,312
aaaa-bbbb-cccc-dddd,2020-03-25T00:00:00,,,,,,,,,,,1892,,,,,,,,85,30,,,119,85,,,144,119,,,220,144,,,,,,,,,,,,,,,,,,,2020-04-02T21:24:00Z,890
1111-2222-3333-4444,2020-03-24T00:00:00,1130,42.30717086791992,0.0,,,,,,,,2491,1250,10.728779999999999,27,9,0,,1944.35808,93,30,1320,488.432,130,93,88,8.9712,158,130,1,0,220,158,0,23,268,585,38,70,13823,1130,2491,10.728779999999999,27,9,23,268,585,38,13823,,2020-04-20T03:32:08Z,1403
1111-2222-3333-4444,2020-03-25T00:00:00,177,46.13768005371094,0.0,,,,,,,,2160,1802,0.7196,0,0,0,,351.09744,93,30,153,37.40071,130,93,7,0,158,130,0,0,220,158,0,0,39,1401,0,71,930,177,2160,0.7196,0,0,0,39,1401,0,930,,2020-04-20T03:32:08Z,441

Sample JSON Export

{
    "ParticipantIdentifier": "aaaa-bbbb-cccc-dddd",
    "Date": "2019-05-16T00:00:00",
    "ActivityCalories": "773",
    "BodyBmi": "42.60182189941406",
    "BodyFat": "0.0",
    "Calories": "2170",
    "CaloriesBMR": "1252",
    "Distance": "7.1389",
    "Elevation": "42",
    "Floors": "14",
    "FoodCaloriesIn": "0",
    "HeartRateIntradayCount": "24",
    "HeartRateZone": {
        "OutOfRangeCaloriesOut": "1705.21152",
        "OutOfRangeMax": "93",
        "OutOfRangeMin": "30",
        "OutOfRangeMinutes": "1327",
        "FatBurnCaloriesOut": "425.50456",
        "FatBurnMax": "130",
        "FatBurnMin": "93",
        "FatBurnMinutes": "78",
        "CardioCaloriesOut": "0",
        "CardioMax": "158",
        "CardioMin": "130",
        "CardioMinutes": "0",
        "PeakCaloriesOut": "0",
        "PeakMax": "220",
        "PeakMin": "158",
        "PeakMinutes": "0"
    },
    "MinutesFairlyActive": "6",
    "MinutesLightlyActive": "189",
    "MinutesSedentary": "746",
    "MinutesVeryActive": "30",
    "RestingHeartRate": "70",
    "Steps": "9197",
    "Tracker": {
        "ActivityCalories": "773",
        "Calories": "2170",
        "Distance": "7.1389",
        "Elevation": "42",
        "Floors": "14",
        "MinutesFairlyActive": "6",
        "MinutesLightlyActive": "189",
        "MinutesSedentary": "746",
        "MinutesVeryActive": "30",
        "TrackerSteps": "9197"
    },
    "Water": "0.0",
    "ModifiedDate": "2020-04-20T03:32:08Z",
    "HeartRateIntradayMinuteCount": "15",
    "BreathingRate": "13.8",
    "Hrv": {
        "DailyRmssd": "12.345",
        "DeepRmssd": "10.19"
    },
    "SpO2": {
        "Avg": "96.1",
        "Min": "93.8",
        "Max": "98.6"
    },
    "CardioScore": "38",
    "TempSkin": "90",
    "TempSkinLogType": ""
}

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