I have had my 965 since May. No problems and I have been very satisfied until now. However, I went on a threshold run this Monday 21/10/24, and my HR seemed to cap at 138 (Z2) which seemed okay for the 10 min warm-up, but didn’t shift from there until after I completed the 18-mins at pace and started the warm down. Exactly the same on the two identical threshold runs I have run since.
was absolutely fine last week and had no problems. I did exactly the same threshold session last week on 17/10/24 and no problems. HR rose when I started the work at pace and was easily in Z3. Same for all other sessions last week, and previous to that. See screenshots. I have cleaned the sensor, dried wrist, snug fit, no damage to the watch. Running 20.32 software.
Any ideas. Extremely frustrating. Additionally so as the Garmin Coach is now readjusting my training plan adding in further threshold sessions as it doesn’t believe I’m managing to Get my HR up!
