Simple Breathing Exercise Claims to Improve Sleep

A simple breathing exercise is gaining popularity on social media. A video demonstrating the technique, which involves breathing into a small bag, claims to improve sleep quality. The video's author, user1343333774390, explains the method and shares an observation of an elderly woman using it on public transport. "She takes out the little bag, puts it to her face, and breathes in and out," the author observes. While the exercise's effectiveness is yet to be scientifically verified, its simplicity and anecdotal evidence suggest potential benefits. Further research is needed to determine its efficacy.