The hunched over walking like Groucho Marx or "flipped L" depends on the patient's anxiety level and the Tummy Tuck's surgical technique.
Having performed hundreds of Tummy Tuck procedures and constantly changing and refining my technique over the years taught me that If the muscle lining is properly numbed during surgery, there will be NO pain after surgery.
Instead, the patients only have a feeling of variable tightness and are NOT hunched over. It is the protective or pain induced hunching over which strains the back muscles resulting is spasms and pain.
If the muscles are not numbed, there will be post surgical tummy pain and a hunching over to alleviate such pain resulting in prolonged back pain. This phase, if allowed to occur lasts 2-3 weeks until the patients gradually assume an erect position alleviating the strain to the back muscles.
Dr. P. Aldea