I noticed recently on my Venu 3 heart rate can be really inaccurate.
Works on first workout but when do a second, wildly out.
I have set up a ticket but Garmin support is not good and no response yet
Anyone any advice or similar issues.
An example would be a session where watch was showing 158 and should have been 90.
Another where it should have been a lot higher cut seemed never to go over 120.