Caroline Sandry's Pilates: 30 Days to Flat Abs is designed to help you train your core to be stronger and more toned in just one month. These 7 x 10 minute routines will strengthen your muscles and create a firmer tummy. All you need to do is follow Caroline's carefully laid out day-to-day schedule. These choreographed routines will strengthen and tone your entire core; your upper, mid and lower back, your waist, tummy, bottom and pelvis making you stronger and slimmer.