How To Wear a Waist Trainer Gariella January 26, 2016 FASHION If you finally want to have the sleek and sexy waistline you’ve always deserved, use a waist trainer to get the job done. With the right combination of exercise, diet, waist training gear and patience, you’ll be on your way to that perfect hourglass shape in no time. First, you’ll need to choose the right waist shaper or corset for you. If you’re a beginner, try a shaper and work your way up to a full corset. Keep active and wear the shaper or trainer as you work out. This will increase the thermogenesis in your waist area. This thermal activity will help you stimulate perspiration and start whittling away to that perfect waist.