The simple act of standing on one leg can reveal how well you are aging, according to a new study by researchers at the Mayo Clinic in the United States. In fact, the study found that how long you can do it is a more accurate measure than strength or gait, since balance declines more rapidly with age than these other indicators.

The study involved 40 healthy people over the age of 50 — half of them under 65, half 65 and older — who underwent walking, balance, grip strength and knee strength tests.