Walk 10,000 steps a day. The number sits on watch faces and in fitness apps, and it sounds like a finding.

It isn't one. It's a product.

The number comes out of 1960s Japan. In 1963, Iwao Ohya, who ran a Tokyo clinic, worried that postwar Japan had gone sedentary. He told engineer Juri Kato the fix was simple: everyone should walk 10,000 steps a day. Kato worked for Yamasa Tokei Keiki, a clock-and-meter maker, and two years later he had a device for it, the manpokei, or “ten-thousand step-meter.” It was timed to the 1964 Tokyo Olympics. The number was a slogan for a gadget.

It spread anyway. A national 10,000-step walking association grew chapters in all 47 prefectures. Japan's health ministry was still recommending 10,000 steps in 2015, and by its own reviewers' admission the recommendation was not based on solid evidence.

What the evidence says is gentler. Lee and colleagues followed 16,741 older women (JAMA Internal Medicine, 2019) and found mortality fell from about 2,700 steps a day, then flattened near 7,500. A meta-analysis of 15 cohorts and 47,471 adults (Paluch et al., Lancet Public Health, 2022) put the plateau around 6,000 to 8,000 steps for people over 60, and 8,000 to 10,000 under that. A 2025 update landed near 7,000.

So the target isn't wrong, exactly. It's just not the line. Most of the benefit shows up earlier, and the last few thousand steps buy very little.

Walking is still good for you. The round number was just easier to sell.

Sources: – Lee IM et al., “Association of Step Volume and Intensity With All-Cause Mortality in Older Women,” JAMA Intern Med 2019;179(8):1105-1112. doi:10.1001/jamainternmed.2019.0899 – Paluch AE et al., “Daily steps and all-cause mortality: a meta-analysis of 15 international cohorts,” Lancet Public Health 2022;7(3):e219-e228. doi:10.1016/S2468-2667(21)00302-9 – Ding D et al., “Daily steps and health outcomes in adults,” Lancet Public Health 2025;10(8):e668-e681. doi:10.1016/S2468-2667(25)00164-1 – Origin: Leo Lewis, Financial Times (2016); Catrine Tudor-Locke, Manpo-Kei: The Art and Science of Step Counting (2003)

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