After setting up the connection from the Stryd platform to PolarFlow or Suunto App, data will flow automatically into PowerCenter and the Stryd app on your phone.
If the import from PolarFlow or Suunto App suddenly stopped working, disconnect from PolarFlow/Suunto App from within PowerCenter, and reestablish the connection. That usually resolves the problem. Note that only runs done after the connection is established will upload (not historic runs).
If you have additional questions, contact firstname.lastname@example.org.