Deletion of Coherent breathing

Comment: I've already https://en.wikipedia.org/w/index.php?title=Conscious_breathing&diff=877252413&oldid=877252033 replaced the unsourced nonsense at Conscious breathing with the content in here, so merger is basically done. Redirection is valid per -R but per Buidhe, Conscious breathing also needs a look at per MEDRS
Stance: merge
Cited policy: Wikipedia:Deletion policy (WP:ATD)