Yogic texts prescribe specific methods:
For the practitioner, the goal is not to count the nāḍīs but to experience their purification through consistent, disciplined practice – culminating in nāḍī śuddhi and, ultimately, cakra bheda (piercing the wheels of energy). 72000 nadis
From a modern scientific viewpoint, the Nadis are often correlated with the nervous system. While the physical nerves carry electrical impulses, the Nadis carry the subtle energy that powers the nervous system. 72000 nadis
"When the Nadis are full of impurities, the breath does not go into the middle Nadi (Sushumna). Then there is no attainment of the Unmani state (deep meditation)." 72000 nadis