> For the complete documentation index, see [llms.txt](https://docs.suggestic.com/graphql/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.suggestic.com/graphql/query/queries/tracking/hrv.md).

# HRV

Heart Rate Variability

Use the `hrvLogs` query to obtain the total records of the "HRV log" logged by the user for the specified date range.

### Required Arguments

<table data-header-hidden><thead><tr><th></th><th width="219"></th><th></th></tr></thead><tbody><tr><td>Argument</td><td>Type</td><td>Description</td></tr><tr><td><code>start</code></td><td>Date!</td><td>The starting date of the defined date range. Use the format: <code>YYYY-MM-DD</code></td></tr><tr><td><code>end</code></td><td>Date!</td><td>The end date of the defined date range. Use the format: <code>YYYY-MM-DD</code></td></tr><tr><td><code>first</code></td><td>Int</td><td>Retrieves the first results from the list.</td></tr><tr><td><code>after</code></td><td>String</td><td> It takes the <em>cursor type</em> and retrieves results after that position.</td></tr><tr><td><code>id</code></td><td>ID</td><td>Id of desired tracking record.</td></tr><tr><td><code>source</code></td><td></td><td>Source of input, <strong>default</strong> is set to <strong>suggestic</strong>. enum SourceType { APPLE FITBIT GARMIN GOOGLEFIT_NATIVE GOOGLEFIT_REST HUAWEIHEALTH IHEALTH MISFIT OMRONCONNECT OMRONWELLNESS OURA POLAR SAMSUNG STRAVA SUGGESTIC SUUNTO WITHINGS }</td></tr></tbody></table>

### Available Fields

|             |                |                                                                                                                                                                                                                                            |
| ----------- | -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| Field Name  | Type           | Description                                                                                                                                                                                                                                |
| `id`        | Int!           | Id of the HRV log.                                                                                                                                                                                                                         |
| `value`     | PositiveFloat! | HRV registered value.                                                                                                                                                                                                                      |
| `timestamp` | Float!         | HRV log timestamp `YYYY-MM-DDT hh:mm:ssZ`                                                                                                                                                                                                  |
| `createdAt` | Int!           | Date the user logged their HRV log `YYYY-MM-DDT hh:mm:ssZ`                                                                                                                                                                                 |
| `source`    | DateTime!      | Source of input, **default** is set to **suggestic**. enum SourceType { APPLE FITBIT GARMIN GOOGLEFIT\_NATIVE GOOGLEFIT\_REST HUAWEIHEALTH IHEALTH MISFIT OMRONCONNECT OMRONWELLNESS OURA POLAR SAMSUNG STRAVA SUGGESTIC SUUNTO WITHINGS } |

### Example

{% tabs %}
{% tab title="Request" %}

```graphql
query {
  hrvLogs(start:"2023-10-01" end:"2023-10-03" source:SUGGESTIC){
    edges{
      node{
        value
        timestamp
        createdAt
        source
        id
      }
    }
  }
}
```

{% endtab %}

{% tab title="Response" %}

```graphql
{
  "data": {
    "hrvLogs": {
      "edges": [
        {
          "node": {
            "value": 110,
            "timestamp": "2023-10-02T10:10:23Z",
            "createdAt": "2023-10-03T18:54:37Z",
            "source": "SUGGESTIC",
            "id": "SHJ2TG9nOjEwMDg3MjE="
          }
        }
      ]
    }
  }
}
```

{% endtab %}
{% endtabs %}