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Everyone knows how to find the age of a fallen
. We count the
of rings on the tree's stump. A scientist has found a new way to measure the
of people – get them to stand on one leg. Dr Kenton Kaufman from the Mayo Clinic in the USA said standing on
leg shows how well a person can balance. He said
becomes more difficult as we age. Dr Kaufman added: "Balance is an important
because, in addition to muscle strength, it requires input from
, the [hearing] system, and the [senses]." He added: "Good balance provides the
to carry out activities of daily living without the fear of falling, and this leads to improved
of life and healthy ageing."alance reflects how the body's systems are working
."
