Read "The Man Who Was Six" by Floyd L. Wallace online for free on Textopian. Full text with search, annotations, highlights, and AI-powered reading aids.
Once he got started, walking wasn't hard. His left side swung at a different rate from his right, but that was due to the variation in the length of his thighs and lower legs, and the two rhythms could be reconciled. He swept along, gaining control of his muscles. He became aware that he was whizzing past everyone.
He slowed down -- he didn't want to attract attention. It was difficult but he learned to walk at a pedestrian pace. However poorly they'd matched his legs, they'd given him good ones.