How about practicing 10 minutes at a time? According to relevant data, it is better to hit the wall 200 times a day, each time 10 minutes. Main points of hitting the wall: stand with your back against the wall and your feet shoulder width apart. The distance between the foot and the wall is calculated with your own shoes, which is about 1.0- 1.5 pairs of shoes. After standing up straight, people take a deep breath and then lean back against the wall. When touching the wall, the inhaled air is pushed out by the wall.