Five months ago I bought a Garmin Forerunner 265 together with the Garmin HRM-Pro Plus.
I have noticed that the pace is different with and without the HRM band. There is a lot of discussion about this and they recommend disabling the distance and step settings.
Whether I run only with the Forerunner watch or use the HRM band with this setting, my running speed is slower by about 1:30/km.
This is very unnerving and I don't understand what my real speed is.
If you have any advice it's much appreciated, thanks!
