> ## Documentation Index
> Fetch the complete documentation index at: https://docs.junction.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Polar

> Understand Polar integration limitations where historical data backfill is only available for sleep and sleep stream resources.

## Historical backfill with Polar

Polar, unlike most other providers, doesn't offer historical data for most of its resources.
The only resources that do have it are Sleep and Sleep Stream - 28 days each.


## Related topics

- [Bring Your Own OAuth](/wearables/connecting-providers/bring-your-own-oauth/overview.md)
- [Getting Started](/sense/python-sdk/getting-started.md)
- [Timestamps and Time Zones](/wearables/providers/timestamps-and-time-zones.md)
- [Post Team Data Pull Preferences](/api-reference/org-management/team-data-pull-preferences/upsert-team-data-pull-preferences.md)
- [Data Attributions](/wearables/providers/data-attributions.md)


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