Home Health and Wellness Flatten your belly, slim your thighs, and firm your butt in 2 weeks– without a single sit-up or squat. These five ballet-inspired moves use one piece of equipment you’re sure to have in your home–a wall to gently increase your flexibility and range of motion. The result: You’ll isolate the tough to reach muscles that pull in your belly, lift your backside, and trim your thighs.