1, the US military's "two-minute sleep method" is mainly to let people relax themselves quickly. The main reason why modern people can't sleep is that young people always dream when they sleep, which makes them fall into mental internal friction. On a whim, all parts of the body can't relax, so it is naturally difficult to fall asleep.
2. With the decrease of physical labor of modern people, modern young people generally suffer from insomnia. As the saying goes, I sleep at five o'clock and start at seven o'clock. The prince praised me for my good health. Sleeping late for a long time will lead to a series of physical problems, which will affect people's life and work. In order to make pilots fall asleep quickly, the Naval Aviation School invented the "two-minute sleep method".