What you want to ask is how to bend over, lean forward and fall? Relax abdominal muscles, etc.

1, abdominal muscle relaxation, abdominal muscle is an important muscle group to support the abdomen, abdominal muscle relaxation or lack of exercise, will lead to abdominal muscle can not be effectively supported, so that when bending over, feel the stomach fall.

2, abdominal fat accumulation, too much abdominal fat, will increase the weight of the abdomen, making it easier for the abdomen to sag when bending over.