Thanks...you aint old...get on the Mats 
I have couple of very good friends around 10yrs younger than me
& both are very good grapplers etc, Jeez Is it Damn hard work for
Me grappling them.
Also know A Highley rated MMA trainer. I take my youngest son to
His Gym for training.
Seriously wish I had got into that when I was teens or 20's.