Recent research suggests that, more than any other activity, a person’s ability to stand on one leg changes with age. It appears to be the first fitness marker to go.
Scientists think that’s because it uses so many different parts of the brain and body at once.
Indeed the NHS Suffolk and North East Essex Integrated Board asks: “How long can you stand on one leg like a flamingo?”
They add: “It might sound like an odd question, but your answer to the above question could tell you a lot about your general health and fitness.