Waist training just doesn't work. Contrary to what celebrities say, waist training won't reduce belly fat, won't cause you to lose weight, or give you liposuction-like results. All a waist trainer can do is tighten your torso for a temporary change in appearance. Women often wear compression garments, such as corsets and girdles, to create the illusion of a slimmer figure.
Waist reducer belts work the same way, wrapping and compressing the stomach, temporarily redistributing the skin to make you look thinner. According to the Mayo Clinic, using a girdle-like device can improve appearance and posture, but it won't strengthen or tone stomach muscles. Only diet and exercise will truly flatten the stomach. Trimmer straps are basically elastic girdles for lack of a better term.
Before workouts, you should tie your waist with your belt to trap heat. Heat increases body temperature, leading to better weight loss results, according to manufacturers. They are made from a variety of materials, but the most common is neoprene, a synthetic rubber. The abdominal belts come off inches from the waist.
You may see a reduction of 1 to 2 inches in your waist circumference. However, this weight loss is not permanent. You could temporarily reduce your waist circumference. Abdominal belts are not medically approved and there is no research to support their ability to lose weight in the long term.