5x for a Crimbo pressie . . so
Paired my chest strap with the 5X, put on the chest strap and opened up the HRV app on the 5x.
Started the test and watched my live HR reading and the 3 mins tick down.
At the end of the 3 mins, no result no reading nothing other than 3 dashes - - -
Repeated 3 times and the same thing
Am I missing something?