There are several factors that should be considered when evaluating oversized waist circumference, such as genetics, nervous system, eating habits, metabolic disorders, calorie supply and demand disorders.However, the mechanism of the formation of abdominal obesity is generally consistent; that is, the dietary energy intake is more than the body consumption, so that excess energy is stored in the body as fat.
    Obese individuals often have the habit of overeating, eating before bedtime, overeating at dinner, or lower physical activity. This is especially apparent after middle age when the amount of physical labor gradually decreases, resulting in fat accumulating in the abdomen and buttocks. In addition, sleep deprivation, stress and pregnancy may also contribute to abdominal obesity.