The ten-second balance test
Stand on one leg for ten seconds. A Brazilian cohort study found that middle-aged and older adults who could not do it were roughly twice as likely to die in the following years — and the test needs no equipment at all.
goodWell supported, with the usual caveats about effect size.Revised 28 Sept 2026
The test
Shoes off, arms at your sides, eyes open. Lift one foot and place it lightly against the back of the standing leg, and hold for ten seconds. Then switch sides. That is the whole protocol — the version used in the research allowed up to three attempts per leg, and passing meant completing ten seconds on at least one of them.
What a cohort in Brazil found
Between 2008 and 2020, researchers at the CLINIMEX exercise medicine clinic followed about 1,700 adults aged 51 to 75 who took the test at their first check-up. Roughly one in five could not hold the position for ten seconds. Over a median follow-up of around seven years, those who failed the test were about twice as likely to die from any cause as those who passed — even after adjusting for age, sex, body mass and existing disease.
This is an observational finding, not a prescription. Failing the test does not cause death; it marks the same decline — in muscle, balance, reflexes, vessel health — that causes both the wobble and the risk. That is precisely why it is useful: one number, summarising many systems at once, like grip strength and walking speed.
Why balance belongs beside blood pressure
Falls are the second leading cause of unintentional-injury death worldwide, and the risk climbs steeply with age. Balance training — tai chi, heel-to-toe walking, and yes, standing on one leg while the kettle boils — is among the few interventions with direct evidence for fewer falls. The ten-second test is the cheapest possible entry point: it tells you whether this is a system worth training, in less time than it takes to read this sentence.