Waist compression restricts lung expansion, reduces oxygen intake, impairs blood vitalization, and hinders circulation.

Original passage

Of late years the dangers resulting from compression of the waist have been so fully discussed that few can be ignorant in regard to them; yet so great is the power of fashion that the evil continues. By this practice, women and young girls are doing themselves untold harm. It is essential to health that the chest have room to expand to its fullest extent in order that the lungs may be enabled to take full inspiration. When the lungs are restricted, the quantity of oxygen received into them is lessened. The blood is not properly vitalized, and the waste, poisonous matter which should be thrown off through the lungs is retained. In addition to this the circulation is hindered, and the internal organs are so cramped and crowded out of place that they cannot perform their work properly.