Hi, so I am slowly but surely losing my mummy tummy.. Yay! But is sags at the front and that's the only part I'm seeing no results. I've cut out cheese and sweets and chocolate. I do 100 sit-ups, squats and lunges and the occasional Zumba if my daughters asleep. I've gone down a dress size already but it's that one bit I need to budge! Any tips?