Got myself the Garmin Forerunner 965 for Christmas and went on my first run with it yesterday, and I think it got my heartrarte all wrong
I ran my second fastest 10k (4:25/km pace) which was only one minute under my PB from one week ago (44:08 vs. 43:09), so the efforts were definitely comparable.
However, on last week's PB, my old Apple Wa...