Where the 10,000 steps come from
In 1965, Yamasa, a Japanese clock maker, launched a pedometer called Manpo-kei, which translates as "ten-thousand-step meter". The name was the product and the slogan, at a time when Japan was riding the enthusiasm of the 1964 Tokyo Olympics. When Catrine Tudor-Locke and David Bassett reviewed the evidence on steps per day in 2004, they traced the 10,000 to Japanese walking clubs and to that business slogan from thirty years earlier, and concluded that the number was a reasonable estimate for healthy adults, with no study behind it.
For the next forty years the number lived on being round and easy to remember. Only from 2019, with accelerometers on the wrists of tens of thousands of people followed for years, was there data to ask it whether it was true.
What the studies show
The first study to ask the question with accelerometers was by I-Min Lee and colleagues, published in 2019: 16,741 American women with a mean age of 72, followed for about four years. Those taking around 4,400 steps a day had a clearly lower risk of death than those taking 2,700. Risk kept falling with more steps up to close to 7,500 a day, and levelled off from there. The 10,000 added nothing that could be seen.
The following year, Pedro Saint-Maurice and colleagues asked the same question of 4,840 American adults aged 40 and over, men and women, followed for ten years. Compared with 4,000 steps a day, 8,000 were associated with about half the risk of death, and 12,000 with about a third. Step intensity, once the total was accounted for, made no difference.
In 2022, Amanda Paluch and colleagues pooled 15 cohorts from four continents, with more than 47,000 adults, in the meta-analysis shown on the pillar page. Risk falls with steps up to about 6,000 to 8,000 a day from age 60, and 8,000 to 10,000 before that age. Beyond those values the curve flattens. The same year, Borja del Pozo Cruz and colleagues looked at 78,500 people in the UK Biobank and saw the same shape up to about 10,000 steps, with one nuance: a brisker pace in the fastest 30 minutes of the day brought some additional reduction, mostly in new cardiovascular disease and cancer.
So, how many?
The honest answer has three parts.
- The biggest gain is at the start. Going from 3,000 or 4,000 steps to 6,000 or 7,000 is where risk falls most, in every study. It is also the easiest step to take: one more walk a day.
- The curve flattens between 7,000 and 10,000. From age 60, earlier; before that, later. There is no magic threshold, and no study found a point beyond which walking more does harm.
- Pace is the extra, not the base. First the total; then, if you want, a part of the day at a brisk pace.
The World Health Organization does not speak in steps. It speaks of 150 to 300 minutes of moderate activity a week, plus strength twice a week. The two languages say the same thing: in cadence studies, 30 minutes of brisk walking give about 3,000 to 3,500 steps, and half an hour a day at that pace, added to what you walk without thinking, takes most people to the zone where the curve flattens.
What this does not say
All these studies are observational: they measure the steps of people who already walk and follow what happens to them. Those who walk more are, on average, healthier to begin with, and the researchers adjust for what they can, such as age, smoking, weight and existing disease, but never for everything. The direction of the effect is consistent across countries and ages, which is why it is taken seriously; the exact size of the gain for any one person, nobody knows.
Nor do they say what is happening to you. The movement page shows Paluch's curve and lets you place your number on it, without a verdict: the reading of your case, with the rest of the context, is the conversation for the appointment.
How to start without obsessing
- A week of counting, changing nothing. The phone in your pocket is enough. It is the starting point, and it avoids beginning with a goal that is not yours.
- A thousand more than the week before. Tudor-Locke and Bassett suggested, back in 2004, stepped goals from what each person does, rather than one number for everyone. A thousand steps are about ten minutes of walking.
- Swap "I have no time" for pieces. All steps count: the phone call on foot, the bus one stop early, the stairs. In the studies, "incidental" steps count towards the total as much as those from a planned walk.
- Once the total is there, a faster piece. Ten or fifteen minutes at a pace where you can still talk but not sing. That is del Pozo Cruz's extra.
- Look at the week, not the day. One day below undoes nothing; the average is what counts.