"Βacuum in the stomach". What you need to know.

Exercise "vacuum in the stomach" must be performed both lying down and standing or leaning forward. Considering that this is primarily a strengthening exercise, you should perform it as often as possible, or at least 5 times a week. You should get used to the fact that the transverse abdominal muscles should be constantly tense. With regular exercise, after a few weeks, the muscles will tone up, and you no longer have to make efforts to control it.