Meaning of the word "as fit as a fiddle" in English

What does "as fit as a fiddle" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

as fit as a fiddle

US /æz fɪt æz ə ˈfɪdl/
UK /æz fɪt æz ə ˈfɪdl/

Idiom

in excellent physical health

Example:
My grandmother is 90 years old, but she's still as fit as a fiddle.
After a good rest, he was as fit as a fiddle and ready to go.