You are as young as you think you are...unless you're old. In all seriousness I must think I'm really old because I'm falling apart. Still have sciatica. I have been trying a few new stretches and I think they are helping a little. The only problem is the longer I sit the more it hurts so writing has been painful, both physically and mentally. I am making progress though. Happy with how things are coming along.
Speaking of old. I hope I'm as cool as this "Grandpa" when I'm his age.
Have a great weekend!