Is 10,000 steps a day a myth?
The target is real; its origin is not scientific. The 10,000-step goal began as the name of a pedometer sold in Japan in 1965. No study picked the number by testing it against other targets. When researchers finally did test daily step counts, decades later, they found the benefit levelling off between about 7,000 and 10,000 a day depending on age. So 10,000 is not wrong. It is simply higher than the point where most of the gain has already arrived.
The pedometer that named the number
In the enthusiasm around the 1964 Tokyo Olympics, the Japanese firm Yamasa Tokei Keiki sold a pedometer called the manpo-kei, 万歩計: literally “ten-thousand-step meter”. Dr Yoshiro Hatano’s work on energy expenditure later gave the figure a rationale, but the number was chosen for the product first. Researchers who have tested step counts since, among them Dr I-Min Lee and Dr Amanda Paluch, describe it as a marketing figure that happened to be memorable.
It was also a good one. Ten thousand is round, ambitious and easy to remember, and the first generation of wearables adopted it as a default. Most trackers still do.
What the studies found when they tested it
| Study | People | Where the benefit levelled off |
|---|---|---|
| Lee et al., 2019 | 16,741 older women | about 7,500 steps a day |
| Paluch et al., 2022 | 47,471 adults, 15 cohorts | 6,000 to 8,000 over 60; 8,000 to 10,000 under 60 |
| Banach et al., 2023 | 226,889 people, 17 cohorts | benefit began above about 3,967; each extra 1,000 worth about 15 percent |
| Ding et al., 2025 | about 160,000 adults, 57 studies | most outcomes plateaued near 7,000 |
| Zhuang et al., 2026 | 8,570 US adults over 40 | estimated life expectancy gains flatten near 8,000 |
Read together, the picture is consistent: benefit starts low, rises steeply through the middle thousands, and flattens somewhere between 7,000 and 10,000. Every study is cited with its DOI on what the research says, and the age split is laid out in how many steps a day do you actually need?
Why the myth matters
A target that is too high does two kinds of damage. Someone walking 4,000 steps a day sees 10,000 as out of reach and stops trying, when the evidence says their next 2,000 steps are the most valuable ones anybody can take. And someone who walks 8,000 most days reads a missed 10,000 as failure, when they are already in the band where the benefit levels off.
The honest reading of the research is a slope, not a cliff. There is no number below which walking is pointless and no number above which it becomes harmful. In these studies more was never worse; it was simply less additional.
What to do with the number
Keep 10,000 if you already reach it and it suits you. Otherwise set a goal in the band for your age, 7,000 to 8,000 for most adults, and treat the goal as a line with some slack rather than a pass-or-fail mark. Manpo Steps defaults to 8,000, lets you set any number, and counts the day against the total the Health app shows rather than a single device’s guess. It is named for the manpo-kei, and the number it defends is the one the evidence supports, not the one on the box.
Questions
Who invented the 10,000 steps a day goal?
A pedometer maker. In 1965 Yamasa Tokei Keiki sold a device called the manpo-kei, which means ten-thousand-step meter, in the fitness enthusiasm after the 1964 Tokyo Olympics. The number was a product name before it was a health target.
Is walking 10,000 steps a day bad or too many?
No. None of the large studies found harm at 10,000 or above; the benefit simply stops growing much past about 7,000 to 10,000 depending on age. If you already walk that far, there is no reason to stop.
How far is 10,000 steps?
Roughly 7 to 8 kilometres, or about 5 miles, for an average adult stride. Stride length varies with height and speed, so your own distance can be noticeably different.