Google Health API reference

Daily VO2 Max: the Google Health API daily-vo2-max data type

Read from Google’s documentation on 2026-10-17 · discovery document revision 20261014 · Google’s data-types page last updated 2026-10-06

Daily VO2 Max (daily-vo2-max) is a Daily data type in the Google Health API. Google's data-types table lists list and reconcile for it under the .activity_and_fitness.readonly and .activity_and_fitness.writeonly scopes. The table marks it with neither webhook nor true-zeros support. Google's Fitbit migration table names no Fitbit Web API predecessor for it.

Daily VO2 Max at a glance

From the Daily VO2 Max row of Google’s data-types table, joined to the discovery document’s DataPoint schema.

Display name: Daily VO2 Max
dataType (in endpoint URLs): daily-vo2-max
filter parameter: daily_vo2_maxGoogle: “The identifier separated by underscores (for example, active_minutes) used as the value for the dataType filter parameter in daily rollup and rollup requests.”
Record type: Daily — Google: “Represents measurements aggregated or recorded on a daily basis.”
Storage resolution: not stated in Google’s table
Webhook support: Not marked in Google’s table
True zeros support: Not marked in Google’s table
Channel: v4
DataPoint field: DataPoint.dailyVo2Max → DailyVO2MaxIts description: “Optional. Data for points in the daily-vo2-max daily data type collection.”
Compatible devices: 23 in Google’s table

Operations and request paths

The operations Google’s table lists for daily-vo2-max, each matched to its users.dataTypes.dataPoints method in the discovery document. The path is the documented path template (the method’s flatPath on https://health.googleapis.com/) with {dataTypesId} filled in as daily-vo2-max. Google on {user}: “The {user} can be either the alias me or the authenticated user's numeric Health User ID (retrieved via GetIdentity).”

Table lists	Method	Documented path template
`list`	`list`	`GET https://health.googleapis.com/v4/users/{usersId}/dataTypes/daily-vo2-max/dataPoints`
`reconcile`	`reconcile`	`GET https://health.googleapis.com/v4/users/{usersId}/dataTypes/daily-vo2-max/dataPoints:reconcile`

Every method, and how many of the data types list it: the methods overview.

Scopes

The scopes Google’s table lists for daily-vo2-max, as full URLs, with the consent text Google’s Scopes page gives each. Every Google Health API scope.

Scope	Access	Google’s permission text
`https://www.googleapis.com/auth/googlehealth.activity_and_fitness.readonly`	read	See your Google Health activity and fitness data.
`https://www.googleapis.com/auth/googlehealth.activity_and_fitness.writeonly`	write	Add activity and fitness data to Google Health, and edit or delete the data it adds.

Fields of Daily VO2 Max

The schema the discovery document gives DataPoint.dailyVo2Max, required fields first. Types are as the discovery document states them; the label is the word Google’s description opens with. The schemas its fields refer to follow, one level deep.

DailyVO2Max — Google: “Contains a daily summary of the user's VO2 max (cardio fitness score), which is the maximum rate of oxygen the body can use during exercise.”

Field	Type	Google’s description
`date`Required	`Date`	Required. The date for which the Daily VO2 max was measured.
`vo2Max`Required	`number/double`	Required. Daily VO2 max value measured as in ml consumed oxygen / kg of body weight / min. Must be in the range `[0, 100]`.
`cardioFitnessLevel`Optional	`string`	Optional. Represents the user's cardio fitness level based on their VO2 max. `CARDIO_FITNESS_LEVEL_UNSPECIFIED` — Unspecified cardio fitness level. `POOR` — Poor cardio fitness level. `FAIR` — Fair cardio fitness level. `AVERAGE` — Average cardio fitness level. `GOOD` — Good cardio fitness level. `VERY_GOOD` — Very good cardio fitness level. `EXCELLENT` — Excellent cardio fitness level.
`estimated`Optional	`boolean`	Optional. An estimated field is added to indicate when the confidence has decreased sufficiently to consider the value an estimation.
`vo2MaxCovariance`Optional	`number/double`	Optional. The covariance of the VO2 max value.

`Date`

Google: “Represents a whole or partial calendar date, such as a birthday. The time of day and time zone are either specified elsewhere or are insignificant. The date is relative to the Gregorian Calendar. This can represent one of the following: * A full date, with non-zero year, month, and day values. * A month and day, with a zero year (for example, an anniversary). * A year on its own, with a zero month and a zero day. * A year and month, with a zero day (for example, a credit card expiration date). Related types: * google.type.TimeOfDay * google.type.DateTime * google.protobuf.Timestamp”

Field	Type	Google’s description
`day`	`integer/int32`	Day of a month. Must be from 1 to 31 and valid for the year and month, or 0 to specify a year by itself or a year and month where the day isn't significant.
`month`	`integer/int32`	Month of a year. Must be from 1 to 12, or 0 to specify a year without a month and day.
`year`	`integer/int32`	Year of the date. Must be from 1 to 9999, or 0 to specify a date without a year.

Fitbit Web API predecessor

Google’s Fitbit Web API → Google Health API data-type table has no row for daily-vo2-max, so it names no Fitbit Web API predecessor.

Fitbit Web API scopes Google maps to daily-vo2-max’s scopes: activity, cardio_fitness.

Google’s full Fitbit Web API mapping tables · the migration playbook

Compatible devices

The 23 devices Google’s table lists as able to record and sync daily-vo2-max.

Fitbit Air
Fitbit Alta HR
Fitbit Blaze
Fitbit Charge 2
Fitbit Charge 3
Fitbit Charge 4
Fitbit Charge 5
Fitbit Charge 6
Fitbit Inspire 2
Fitbit Inspire 3
Fitbit Ionic
Fitbit Luxe
Pixel Watch
Pixel Watch 2
Pixel Watch 3
Pixel Watch 4
Fitbit Sense
Fitbit Sense 2
Fitbit Versa
Fitbit Versa 2
Fitbit Versa 3
Fitbit Versa 4
Fitbit Versa Lite

Google’s documentation

Daily VO2 Max in the v4 REST reference

Related on this site

VO2 Max API: How to Get VO2 Max Data — the metric on every platform this site covers, each type quoted in its platform's own words
Verification and rate limits
The Fitbit Web API turn-off

Questions

Which OAuth scopes does the Google Health API daily-vo2-max data type need?

Google's data-types table (read 2026-10-17) lists https://www.googleapis.com/auth/googlehealth.activity_and_fitness.readonly and https://www.googleapis.com/auth/googlehealth.activity_and_fitness.writeonly for daily-vo2-max. The Scopes page's consent text: .activity_and_fitness.readonly, "See your Google Health activity and fitness data."; .activity_and_fitness.writeonly, "Add activity and fitness data to Google Health, and edit or delete the data it adds."

Can apps write daily VO2 max data to the Google Health API?

Not according to Google's data-types table, read 2026-10-17: it lists only list and reconcile for daily-vo2-max, and no create, update or batchDelete operation.

How do you aggregate daily-vo2-max data with the Google Health API?

Not with rollUp or dailyRollUp, going by Google's data-types table: it lists only list and reconcile for daily-vo2-max. Read the data points with list (or reconcile, where listed) and compute any summary yourself.

Does the Google Health API send webhooks for daily-vo2-max?

Not according to Google's data-types table, which does not mark daily-vo2-max with webhook support, and the webhooks guide does not list it.

Other activity and fitness data types

All activity and fitness data types →

Sources checked

Google Health API data types — last updated 2026-10-06 · read 2026-10-17
Google Health API discovery document (v4) — revision 20261014 · read 2026-10-17
Scopes — last updated 2026-10-09 · read 2026-10-17

Google’s text is quoted for identification; each guide page’s footer reads: “Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License.”. Generated from Google’s pages by scripts/fetch-google-health-api.mjs, not typed by hand; Google’s documentation remains the authority.

← All Google Health API data types