Nothing wrong with that man. The important thing is that you're in there training, moving, etc. (whatever your training style may be).
There's this 67 year old dude that goes to my gym that I look up to. Dudes always there, always working hard, busting his ass, strong as hell even at his age. I'd say he can even hang with most of the 20 something year olds (maybe not strength wise but endurance wise). That's the type of dude I want to be one day, to be knocking on the door of my 70s and still training (if I make it that long, fingers crossed)