FDR was pretty thin as a young guy, but developed a pretty big chest and arms with exercise after becoming paraplegic. There are accounts of him sometimes simply flopping off his chair in his office and dragging himself to where he needed to go, if no help or wheelchair was available. But despite the exercise, he never gained any function in his legs and , in the days before anyone thought of such a thing as handicap accessibility, he tended to need and have assistance. Though, he did have one of the first cars equipped with hand-only controls

Doris Kearns Goodwin: No Ordinary Time: Franklin and Eleanor Roosevelt :The Homefront in WWII