The results of a body contouring following aggressive weight loss are visible almost immediately.
However, it may take as many as one to two years or more for the final results of all the recommended body contouring procedures to fully develop. Visible scars will remain, but the overall results are long lasting, provided that you maintain a stable weight and general fitness.
As your body ages, it is natural to lose some firmness. However, most of your initial improvement should be relatively permanent.