Although my father’s in his seventies he is still very young at age

[Freeguy]

Isn't it awkward to say:

Although my father’s in his seventies he is still very young at age . ( I would say "young at heart". What do you think?)

 

[Rover_KE]

I'd say 'young at heart', too.

'Young at age' is wrong.

 

[Winwin2011]

I'd say 'young at heart', too.

'Young at age' is wrong.

Are there any other expressions to say 'He looks younger than his age'?

 

[BobK]

He looks/is young for his age.

Theres a fashion for describing people who are young for their age like this: 'S/he's 85 years young'. (This is quite colloquial.)

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[Rover_KE]

'S/he's 85 years young'. (This is quite colloquial.)
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...and it irritates the hell out of me.

 

[2006]

...and it irritates the hell out of me.

Yes, it's quite silly.

 

[BobK]

:up: Quite. I spent about 5 minutes wondering whether to say more than 'quite colloquial'; I was (unusually) trying to keep my own distaste out of it. ;-)

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[Matthew Wai]

Are there any other expressions to say 'He looks younger than his age'?

Is it correct to say "he looks rejuvenated"?

 

[BobK]

Only if an event has caused it; even then it's an odd word - something you'd use because you couldn't think of a more apt word: 'Ever since he met her he seems... rejuvenated.' (Normally you'd say something like '... he seems much younger/he seems like a man half his age...'

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