Heart rate zones - no bpm option

Hello all,

So as the title implies, for some reason the option to manually enter my heart rate zones (as acquired through a sport medical lab test) is gone in the garmin connect environment.

When I go to my user profile and click the heart rate zones, the only options to choose from are % max HF and %HSR (whatever that may be). There used to be a bpm option as well, but no more.

So how do I now properly enter my zones in the connect app? 

Regards,

Daan