Waist training has not been proven to help with stretch marks. General weight loss will reduce the size and appearance of stretch marks. We suggest moisturizing your skin daily with coconut butter or shea butter. Keeping your skin moist will help reduce the appearance of stretch marks. Bio oil has also been proven to help reduce the appearance of stretch marks. Finally, laser light treatment now has the capacity to help reduce the appearance of stretch marks and scars. Don't forget to own your tiger strips, women create human beings and that's amazing. Thank your body for what it's capable of and honor those marks for what they represent!