Thanks for the info!
Freegards
FDR perfected a kind of ‘fake walk’ that you can see him do in some of the newsreels of the time. One of his sons would stand beside him with the closer arm bent at a 90º angle across his stomach. FDR would slip his arm into his son’s and use his son’s arm as a kind of crutch to take his weight and let him shuffle his legs. They had to practice this so it didn’t look like his son was holding him up.