Have had sprained ankles several times myself. Never been able to walk around without crutches for a while. He’s not even limping. Hoping he got “Booted” so he cant leave the country!
Like you I think, I have had several ankle and foot injuries (and knee) over my life. Mine have been at a level of severity such that I’ve never needed surgery or crutches.
Age though does creep up and now I need to wear elastic knee and ankle supports with increasing frequency and it’s pretty much mandatory if I am doing long distance or rough ground walking. Another decade or two I wouldn’t be surprised if a cane becomes a routine tool.
Biden strikes me physically as an old man with some normal old man physical changes. Either he won’t admit it to himself or tries to fake his way around this march of time. I go for the faking.