Abdominal muscles are different from other muscles. Abdominal muscle exercises such as sit-ups and upside down can promote the growth of abdominal muscles, but they are not helpful to lose abdominal fat. The only way to lose belly fat is through aerobic exercise such as jogging. As for what you call abdominal breathing, if you just suck your stomach hard, it can't play the role of jogging, so it won't have a good effect on abdominal weight loss. The above is for reference only.