HRV decrease since few weeks

:) very high ms value for 46ys, it is the range of the 15-25ys old people, interesting heart's attribute. ofc , there are always outside the standards everywhere. 

before the injury, how much hours did you train per week (running?)? just for curiousity.

My watch says : 35 years old. You're gentleman ! 

Before injury, I train between 9 hours to 12 hours. With ride, row and walk activities. Running represents 3 to 5 hours per week, for approximatevely 30 miles.

Rest Heart rate : 36 and max : 181

yeah, that is always deducting 10 years (as maximum) for "fitness age" from your actual one if the variables are so good. My 2nd thought was the massive overtraining which can cause very high hrv values as parasympathetic overload but regarding your training history i dont think it is the situation, it is not a massive load.

small infection can cause it , i dont think it is hw-related but never knows... did you reboot your watch? (long press and hold the power button till restarting , apprx 20secs ) give it a try and check. i dont have more idea (at the moment)

I've just reboot my watch. I'll return here if values increase :-). Thanks for your time !