eat standing up. Medical scientists' research on the dining posture of different nationalities around the world shows that standing position is the most scientific, sitting position is the second, and squatting position is the least scientific. This is because when squatting, the legs and abdomen are compressed, the blood is blocked, and the blood volume is reduced, which in turn affects the blood supply to the stomach. When eating, it is precisely when the stomach needs fresh blood the most, and some stomach diseases may be related to squatting eating posture. People mostly use sitting posture when eating, mainly because they are tired from work, and sitting posture is the most relaxed.