At what age are you old?

I'm 30 in a week and a half and am just about to embark on 3 years full time at uni...I have a feeling thats gonna make me feel a little more mature than i'd like   but when I was 18, 30 was old ....how naive I was ..I now work with older people and even the 90 year olds seem young!

I'm 31. I don't feel old, but experienced somehow. Maybe it is because I was living abroad for several years and changed locations a lot.. 

Anything 1 month over my age ...so I'm always young

Having turned 50 earlier this year I wasn't quite sure how I would cope! But, I don't feel old - either emotionally or physically - just got a PB for a 10km last week (did take a bit longer to recover though!).

I do reflect on things more than I used to but perhaps that part of being 'mature' rather than old??? 

I'm 63 in January2013, wife says I act like a teenager at times, fortunately I'm fit and healthy, I don't  feel my age and don't usually even think about it.

Just started running again after a lapse of seven years,( 3 weeks training and I'm back to 10k distance albeit slow) it has helped me loose some weight and now I feel even younger.

Think young stay young, thats my mantra.

It all comes full circle. Now retired I find the decades of running come in handy when me and the 4 year grandson go down the park and do races before we go back and do painting or do the bubbles although CBeebies is the thing we disagree on.