Saul had been in a wheelchair for the last thirty years as his old body whithered away with age. Even though the Great Shift may have swapped his brain into a much younger body with perfectly fine legs, that didn't mean he could immediately use them properly. It took weeks to retrain the neural pathways involved in walking. But each step made him so happy. He didn't care how difficult it was,and he didn't care that he was now a woman; he was just so glad to be walking again!