There´s a huge topic here:
It handles mostly resting HRV but if you search the thread for dfa-a1 (a mathematical derivation of HRV which can be used during exercise) you will find some answers to your questions.
There´s a huge topic here:
It handles mostly resting HRV but if you search the thread for dfa-a1 (a mathematical derivation of HRV which can be used during exercise) you will find some answers to your questions.