Hi guys,
So I'm just playing with my Fenix 5x and comparing it to F3.
One thing I did was stress score on both watches. I was wearing a HR strap and did the stress test for 3 min with 5x. Result, 46. Immediately afterwards I did the same test using the same HR strap using F3. Result 93.
Does the 5x has to calibrate to me for the stress score to be accurate? I was surprised to see such a big difference.