The activity file will be downloaded to your computer in whatever format it originally uploaded.Navigate to one of your Activity pages and from the more (ellipses) menu, select 'Export Original'.The FIT format can store information such as sensor data, course points, workout instructions, device settings, etc.
This format is specifically designed for health data, fitness, and sport recordings.
In many cases, the original will be in FIT (Flexible and Interoperable Data Transfer) format. Strava provides the option to export the original version of the activity file from any of your activity pages. We generally recommend exporting the original version of an activity file. There are several options for exporting your data from Strava.