Based on scientific research, when the frequency of the brain waves stays at 8-13 cycle per second, the body enters a state where it can relax, recharge and recover. The rhythm of 8884 breathing can help you to enter the Alpha brain wave:
1) Inhale deeply and slowly for a count of 8 seconds.
2) Hold the breath for 8 seconds.
3) Exhale slowly and evenly for 8 seconds.
4) Hold the breath for 4 seconds.