Hello, I have a question about elves and their physical condition when they're about middle aged for example.

Say, Elves can live for 1000 years, then how would an elf of 500 years look? would he start getting wrinkles? and what about someone of 750, would he need a walking stick, or do they stay fit with their magic?

I know this might be unknown because lore often doesn't reveal details like this.