At 62 I'm afraid my days of playing squash are long gone, but Tai Chi and Kung Fu continue to give the balance to my body, by stretching and opening up the muscles and joints..............it's harder, physically, than it looks.
My back has troubled me since my teens and my years as a golf pro, certainly took their toll.
I won't retire, but will do less of this and more of other things, like fixing other peoples backs and getting into property ( soon I hope )