What it measures
Balance rarely gets the attention that strength and cardio do, yet it quietly underpins everything from climbing stairs to catching yourself on an uneven sidewalk. The single-leg balance test measures postural stability, and in mid-to-later life it doubles as a meaningful marker of fall risk and overall resilience.
How to do it
Stand near a wall or counter on a firm surface, with support within easy reach. Place your hands on your hips, fix your eyes on a point ahead of you, and lift one foot off the ground. Start a timer and count how long you can hold the position before the raised foot touches down or you reach for support. Try both legs, since most people are steadier on one side than the other.
As a rough guide, eyes-open holds tend to look something like this: around 45 seconds under age 40, about 40 seconds in your 40s, roughly 30 seconds in your 50s, near 20 seconds in your 60s, and about 10 seconds in your 70s. These are general reference points rather than hard rules, and balance varies quite a bit from person to person and source to source.
What your time means for your age
The most attention-grabbing research here centers on a single threshold: ten seconds. In an analysis of 1,702 adults aged 51 to 75, the inability to stand unsupported on one leg for ten seconds was associated with an 84 percent higher risk of death from any cause over about seven years of follow-up, even after adjusting for age, sex, body weight, and existing health conditions. As Harvard Health notes in its summary of that study, the finding is an association rather than proof of cause and effect — but it is a compelling reason to take the ten-second mark seriously once you are past 50.
Age matters a great deal here. Failure rates in that study climbed steeply with each passing decade, from around 5 percent in the early 50s to more than half of participants in the early 70s. Published norms for single-leg stance time tell a similar story, with average eyes-open holds of roughly 27 seconds at ages 60 to 69, about 17 seconds at 70 to 79, and around 8.5 seconds at 80 and older. If you are younger, treat this mainly as a coordination check; the longevity link applies to mid-to-later life.
Balance is one of the most trainable abilities on this list. Practicing the one-leg stance itself — near a counter, reaching out to steady yourself whenever you wobble — is one of the simplest ways to build it back. Even a minute or two on each leg while brushing your teeth gives you regular, low-effort reps.
Better balance also pays off in ways that have nothing to do with mortality statistics: steadier footing on stairs, easier reaching, and a lower risk of the falls that so often reshape life after 65.