Roger, you can do the tests on this video as the exercises to improve balance. Also get 2 foam pads and do exercises and stretches on the pads. This will improve your balance as you exercise.
I try doing your balance exercis, I have not, can't do it.
So I told my daughter and son in law what to do, They were perfect , my question is what can I do to get it.
I am 67 yrs I do a lot of exercise to get back my golf game better.
Thanks