This article explains how a Strava activity can be added to a new O-Analyser activity.

We recommend this tutorial from Strava*: https://support.strava.com/hc/en-us/articles/216918437-Exporting-your-Data-and-Bulk-Export#GPX

*To use the activity later, the activity must be exported in GPX format.

If you have any further questions, please contact us.