What Treatment Options Are Available For A Heavy Tummy, Muscle Strain After Giving Birth 30 Years Ago, Causing Difficulty Walking And Discomfort?

Hi, my wife who is 50years old has a big and heavy tummy after giving birth to our second born child 30 years ago. She is distressed by this heavy tummy. It strains her flank muscles on both sides and weigh her front down! She is not walking straight as the weight is pulling her front and whole torso down. Please help us find treatment to this. Thank you.