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Fitbit Activity Log Data Export Format

The Fitbit Activity export contains information about participant exercise activities. Each entry contains information for a single activity session. 

The activity log can include activities from Fitbit's automatic activity tracking as well as activities entered manually by the user.

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 Activity Log List" documentation for more information about using and interpreting Fitbit data.


Data Fields

Zones

For an activity, Fitbit tracks various heart rate "zones," like "Fat Burn" or "Cardio." For each zone, it reports:

  • The minimum and maximum heart rates that define the zone. For example: the "Fat Burn" zone might be between 93 and 130.
  • The number of minutes the user spent in that zone during the activity.

Sample CSV Export

ParticipantIdentifier,StartDate,EndDate,ActiveDuration,ActivityName,ActivityTypeId,AverageHeartRate,Calories,Duration,LastModified,LogType,ManualValueSpecifiedCalories,ManualValueSpecifiedDistance,ManualValueSpecifiedSteps,OriginalDuration,OriginalStartTime,Steps,HeartRateZoneOutOfRangeMax,HeartRateZoneOutOfRangeMin,HeartRateZoneOutOfRangeMinutes,HeartRateZoneFatBurnMax,HeartRateZoneFatBurnMin,HeartRateZoneFatBurnMinutes,HeartRateZoneCardioMax,HeartRateZoneCardioMin,HeartRateZoneCardioMinutes,HeartRateZonePeakMax,HeartRateZonePeakMin,HeartRateZonePeakMinutes,SedentaryMinutes,LightlyMinutes,FairlyMinutes,VeryMinutes,LogID
aaaa-bbbb-cccc-dddd,2020-04-03T18:05:08-04:00,2020-04-03T18:23:02-04:00,1074000,Walk,90013,107,81,1074000,2020-04-03T22:39:29.000Z,auto_detected,,,,1074000,2020-04-03T18:05:08.000-04:00,1575,93,30,0,130,93,18,158,130,0,220,158,0,0,5,7,6,51033094968
aaaa-bbbb-cccc-dddd,2019-05-06T17:05:46-04:00,2019-05-06T17:27:07-04:00,1281000,Run,90009,132,288,1281000,2019-05-06T21:32:57.000Z,auto_detected,,,,1281000,2019-05-06T17:05:46.000-04:00,2153,93,30,0,130,93,15,158,130,7,220,158,0,0,0,0,22,51095237973
1111-2222-3333-4444,2020-03-09T18:07:26-04:00,2020-03-09T18:24:31-04:00,1025000,Sport,15000,114,71,1025000,2020-03-09T22:29:20.000Z,auto_detected,,,,1025000,2020-03-09T18:07:26.000-04:00,843,93,30,0,130,93,14,158,130,3,220,158,0,0,6,8,3,51095237977

Sample JSON Export

{
    "ParticipantIdentifier": "aaaa-bbbb-cccc-dddd",
    "StartDate": "2019-10-09T14:38:58-04:00",
    "EndDate": "2019-10-09T15:03:43-04:00",
    "ActiveDuration": "1485000",
    "ActivityName": "Walk",
    "ActivityTypeId": "90013",
    "AverageHeartRate": "93",
    "Calories": "89",
    "Duration": "1485000",
    "LastModified": "2019-10-09T19:09:03.000Z",
    "LogType": "auto_detected",
    "ManualValueSpecifiedCalories": "0",
    "ManualValueSpecifiedDistance": "0",
    "ManualValueSpecifiedSteps": "0",
    "OriginalDuration": "1485000",
    "OriginalStartTime": "2019-10-09T14:38:58.000-04:00",
    "Steps": "1599",
    "HeartRateZone": {
        "OutOfRangeMax": "93",
        "OutOfRangeMin": "30",
        "OutOfRangeMinutes": "12",
        "FatBurnMax": "130",
        "FatBurnMin": "93",
        "FatBurnMinutes": "13",
        "CardioMax": "158",
        "CardioMin": "130",
        "CardioMinutes": "0",
        "PeakMax": "220",
        "PeakMin": "158",
        "PeakMinutes": "0"
    },
    "SedentaryMinutes": "0",
    "LightlyMinutes": "24",
    "FairlyMinutes": "0",
    "VeryMinutes": "0",
    "LogId": "51095237977"
}