While researching strokes found this
Standing on one leg for 20 seconds can predict chance of dementia - Telegraph
Standing on one leg for 20 seconds can predict chance of dementia
The inability to stand on one leg for more than 20 seconds is associated with microbleeds and "silent" strokes
The self administered test may also predict Alzheimer propensity, if I remember it correctly.
Advice to mahoots do not attempt this on a palenquin