Yamasa Tokei Keiki, a Japanese clock manufacturer, launched a pedometer called the Manpo-kei in 1965. The name translates to “10,000 steps meter”, and that single marketing decision is the reason millions of us today glance anxiously at our phones wondering if we’ve hit five figures before bedtime.
A fitness wave that followed the 1964 Tokyo Olympics gave a Japanese clockmaker its opening, and in 1965 Yamasa Tokei Keiki released a pedometer called the Manpo-kei, capitalising on a country newly enthusiastic about walking and exercise. The word itself is built from three parts: man for 10,000, po for steps, kei for meter. Catchy, memorable, easy to print on a box. The round number was easy to remember, which mattered for a product meant to sell. Nobody involved in that product launch was running a clinical trial. They were selling a gadget.
Key takeaways
- A Japanese clockmaker invented the 10,000-step target in 1965 for a product called the Manpo-kei—purely because the round number was memorable and easy to market
- When scientists finally studied step counts decades later, they discovered the magic number was nowhere near 10,000 for most people
- Even modest increases from today’s average of 5,300 steps deliver measurable health benefits—you don’t need to chase five figures
An Olympic marketing trick, not a health guideline
Catrine Tudor-Locke, a walking-behaviour researcher at the University of Massachusetts Amherst, has traced the slogan’s spread back to this moment, noting that the device launched with a slogan that resonated with the Japanese public on the eve of the Olympics. People started counting, comparing, competing. It’s the same instinct that makes us check how many likes a post got, just with better cardiovascular side effects.
What’s striking is how thin the science was at the time. I-Min Lee, an epidemiologist at Harvard Medical School who has studied step counts and mortality, has noted that when the device launched, “There were no actual studies that had looked at ‘10,000 steps,'” and the figure originated as a slogan chosen because it sounded good and was easy to remember. Sixty years on, that slogan has outlived the company’s other products, most people’s memory of the Tokyo Olympics, and several generations of pedometers. It was a brand name, not a tested health threshold, and what it was not, at the time, was a number with science behind it. Somewhere along the way, marketing copy got mistaken for a medical recommendation, and nobody thought to correct the record until researchers actually went looking.
What the actual research says
Here’s where it gets genuinely interesting, because when scientists finally tested the number decades later, they found something a bit different from 10,000. A major meta-analysis pooling 15 international cohorts and nearly 48,000 adults found that restricted cubic splines showed progressively decreasing risk of mortality among adults aged 60 years and older with increasing number of steps per day until 6000–8000 steps per day and among adults younger than 60 years until 8000–10 000 steps per day. the benefits taper off well before most fitness trackers start congratulating you.
A separate study from the University of Granada dug even deeper, and its authors were blunt about the folklore. The idea that you should take 10,000 steps a day originated in Japan in the 1960s, but had no scientific basis. Their own analysis, published in JACC, found that as few as about 2,600 and about 2,800 steps a day yield significant mortality and cardiovascular disease benefits, with progressive risk reductions up to about 8,800 and about 7,200 steps a day, respectively. For cardiovascular death specifically, most of the benefits are seen at around 7,000 steps.
A large 2023 meta-analysis in the European Journal of Preventive Cardiology, covering 17 studies and nearly 227,000 participants, added a further nuance worth remembering: there’s no magic ceiling. A 1000-step increment correlated with a significant reduction of all-cause mortality of 15%, and similarly, a 500-step increment correlated with a reduced risk of CV mortality of 7%. More steps generally keep helping, but the steepest gains happen at the bottom of the curve, going from barely moving to moving a bit. That first jump from the sofa matters far more than the sprint from 8,000 to 10,000.
So what should you actually aim for?
Consistency seems to beat perfection. One American cohort study looking at weekly patterns rather than daily totals found that participants who only took 8000 steps or more 1 or 2 days during the week also showed substantially lower all-cause and cardiovascular mortality risk. You don’t need seven flawless days to bank real benefit; even irregular effort registers.
None of this means 10,000 is a bad target, particularly if it motivates you to get out the door. But treating it as a scientifically ordained threshold, the way we might treat five-a-day fruit and veg or recommended sleep hours, simply isn’t accurate. If you’re older, unwell, or just starting out, something closer to 6,000 to 8,000 steps appears to capture most of the measurable health benefit, according to the pooled evidence above. If you’re younger and healthier, pushing toward 8,000 to 10,000 still tracks with the research, though the returns shrink the higher you climb. As ever, if you have existing health conditions or concerns about starting a new activity routine, it’s worth having a chat with your GP first, particularly around joint issues, heart conditions, or mobility limitations.
One detail that rarely makes it into the step-count conversation: the average daily number of steps before the COVID-19 pandemic was 5323 in the general population. That’s less than half the mythical target, and yet plenty of research above suggests even modest increases from that baseline, an extra 1,000 or 2,000 steps woven into an ordinary day, produce measurable drops in mortality risk. The walk to the shops instead of the car journey probably does more for you than you’d think.
Sources : academic.oup.com | europesays.com