411 REFERENCE · Wiktionary
4-7-8 method
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Proper noun
1 mul 4-7-8 method
A breathing exercise for relaxation that involves a repeated cycle of inhaling through the nose for four counts, holding the breath for seven counts, and exhaling forcefully through the mouth for eight counts.