When using polar heart rate monitor do you record in polar or strava
So I've followed the various instructions in https://support.strava.com/hc/en-us/articles/360034839691-Analyze-your-Performance-with-Heart-Rate-Data and https://support.polar.com/en/support/how_to_pair_a_heart_rate_sensor_with_polar_beat_app_android to pair my heart rate monitor in polar and then integrate it with Strava.
The remaining question I have is how do I use this?
Do I record my runs in Polar and then it syncs across with heart rate data? Or do i record in strava and then strava accesses the heartrate from polar?