Using hrv daily for 2 yrs now.Took first reading for granted for year or so,then double checked some of the higher out of normal range ones.Frequently first reading 15 pts. higher than second and third which are taken in immediate sucession,other times tight groupings within 3-4 pts.ts thrown me off and really don't know which reading is accurate anymore besides casting doubt on my first 18 months of baseline.Should I just run with the first one,or choose a mean score from the 2-4th readings?? Any suggestions appreciated....thank you.

Run with the first one. The first will be the most accurate. Read the book from cover to end as well as reference back. Great information.