Your runs and Apple Health
My Polar runs aren't showing up
A run recorded on a Polar watch reaches Why Not through Apple Health. Polar Flow writes the run to Apple Health after your watch syncs with it, so a run shows up once Polar Flow syncs.
Open Polar Flow, let it finish syncing, then open Why Not again. If runs still have not arrived, tap Sync now under the Apple Health switch in Polar Flow, which sends the last two weeks again.
Polar Flow, More, General settings, Apple Health: turn it on, tap Turn All Categories On, then Allow.