No. Old is based on how long I've been here. Fitness and feelings are something else. Radio one makes me feel old but not as old as you.
Ach, Soupy, 'old' isn't based on how long YOU'VE been here; such a self centred point of view. You could say 'old' is a convention (something we conventionally agree on as a culture), but even then that concept will change. In the Middle Ages life expectancy was around 35 years old; so if you were 30 you would've been thought of as old.
Nowadays 30 year olds is nowt.
Thankfully I don't have to live your reality. But if you say you're old, then I believe you, mate.