When proper training techniques are executed along with a clean diet, waist training exercises can burn fat and tone up the waistline and abdomen. When trained three to five times a week, the abdominal muscles, obliques and hip-flexing muscles build in definition and size.
When training the waistline and abdominals, it is important to understand that just building the muscles doesn't necessarily result in better aesthetics. The muscles must be defined, but the layer of fat that covers them must also be minimized. Cardiovascular training and a proper diet diminishes the fat that covers the abdominal muscles.