In message , Brian Gaff
writes
Pardon, is this some kind of new dance move.

Standing on one leg is very dependent on footwear and floor covering I find.

Brief article on simple health checks. I don't have a url but for those
50 and up it suggests grip strength, timed repetitive standing from a
hard backed chair sitting position and standing on one leg with your
eyes closed.

Eyes open, I'm fine if a little wobbly. Eyes shut, 5 seconds is
difficult. I guess my inner ear balance organs are shot. Fortunately I
don't suffer from sea sickness.

Blindness might be some advantage if you can find a way of benefiting:-)

--
Tim Lamb