Did you accidentally end a fitness activity on your Garmin device and have to start a new one, hence generating 2 separate activities for what is actually a single activity? What a nuisance! Don’t worry, it happens to the best of us, but there is a solution! Follow the steps below to turn multiple activities into a single one.
Although these steps are for a Garmin device and Garmin Connect, you can follow steps 9 - 14 to combine multiple FIT, GPX, CSV or TCX files from any device or app and replace steps 15 - 18 with any site or app that allows for the manual import of a FIT, GPX, CSV or TCX file (Strava, etc.).