According to the book “the healing power of breath” , the rhythm depends also somewhat on body size. So that is a variable to take into account. They use this c

According to the book “the healing power of breath” , the rhythm depends also somewhat on body size. So that is a variable to take into account. They use this coherence clock : https://coherence.com/coherence_clock.html https://coherence.com/coherence_clock.html