How to Slim Down Your Stomach With Resistance Bands. Part of the series: LS – Women’s Power & Core Workout. Using a resistance band is a great tool because it’s portable and it adds that resistance necessary that’s going to allow you to be able to slim down your waist and tighten and tone. Slim down your stomach with resistance bands with help from a fitness and wellness professional with over 12 years of experience in this free video clip. Read more: http://www.livestrong.com/video/1009750-slim-down-stomach-resistance-bands/