It's ABSOLUTELY not too late to start!!! Go for it!! There are plenty of women your age who would love to take a class taught by someone near their own age!!!! You go Girl!!
P.S. I replied to your e-mail regarding cueing...practice, practice, practice And it will come...I promise.
NO! It's never to late... you are amazing and this will only motivate other to get in shape so that they can had the energy and good health that you possess. Happy New Year and best wishes in all you do.
I started last year at 55! Obviously, I'm NOT going to tell you 51 is too late! You can be an example and tell them it's baloney when they give you the "I'm too old for this" excuse, which I guarantee they'll try! I teach aerobics and Pilates.
Just Do It!
I'm acquainted with a GFI who didn't start instructing until she was in her mid-60's. She pulls in numbers for her morning classes that are precisely triple my own.