If you're looking to lose a pound or two of water weight, improve posture and add some extra motivation into an already healthy lifestyle, a waist trainer could give you the results you desire. Unfortunately, if you're looking for a shortcut to weight loss without having to invest in a fitness- and healthy diet-based lifestyle, a waist trainer simply won't work. Waist training should be viewed as a supplement to healthy habits -- not as a replacement. Picture it this way: If you stopped eating healthy food and exercising, a tight piece of clothing won't be able to maintain your body's slender shape. It takes much more effort than that.