I don't think it makes any difference how old you are.
The Stones are still rocking around the world, as is McCartney, David Gilmour, Sting, Tony Levin is 68.
I'm 37, but I fully intend to carry on playing for ever. I'm vegan, don't drink or smoke, I do yoga and meditate, all with the aim of being able to do what ever I want, for as long as I can.