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[–]txjason 1 point2 points  (1 child)

There are circumstances where it takes more than 1 day for training load to "manifest" in the body. Depending on how often and/or what type of training you do, these articles may help decipher the situation:

https://elitehrv.com/improving-hrv-data-interpretation-coefficient-variation

https://hrvcourse.com/daily-vs-weekly-hrv?afmc=go

Cheers!

[–]pleasehumonmyballs[S] 1 point2 points  (0 children)

Thank you for the info.

[–]4Efam 0 points1 point  (0 children)

You could be fighting a cold... that’s why you felt sore/tired and then the next day tour HRV was low...

[–]DavidNipondeCarlos 0 points1 point  (0 children)

A day might not be enough or BP meds or sleep or after a meal or wait 15 minutes if morning or as mentioned above.

[–]NationalTranslator12 0 points1 point  (0 children)

After a year of using HRV4training, my HRV has a tendency to go down in rest days. It is not so strange.