These daily moves can help you sculpt a lean, firm waistline. But choosing just the right slimming moves is essential—and you don’t necessarily need to turn to corset workouts to achieve your goal. “The waistline often changes after 50 because several things can happen at once. People gradually lose muscle, move less, and burn fewer calories through daily activity. Dead BugsLie flat on your back with your arms extended toward the ceiling and knees lifted in a tabletop position.