According to the American Board of Cosmetic Surgery (ABCS) blog, a waist trainer will not drastically change your body shape. Even if you have the type of body that lends itself to that shape temporarily, your waist trainer is unlikely to have a lasting effect.

Does waist training flatten your stomach?

Contrary to what celebrities say, waist training will not reduce belly fat, make you lose weight, or give you similar results to liposuction. ... Like many get-thin-quick schemes, there is no evidence that weight loss while waist training is due to the corset rather than calorie restriction and exercise.

How long does it take for a waist shaper to work?

Waist training for 8 hours a day will allow your body to improve to the next trainer size in approx 2-8 weeks.