The number 10,000 sounds like something scientists calculated in a lab after decades of research. But it actually started with a Japanese pedometer sold right after the 1964 Tokyo Olympics.
The device was called the manpo-kei, which literally means "10,000-step meter." Its makers chose that number partly because the Japanese character for 10,000 looks a little like a walking person—making it easy to remember. It was a marketing slogan to sell step counters, not a fact doctors discovered.
So why does nearly every health expert today tell you to hit 10,000 steps? A new review published in the British Journal of Sports Medicine tried to find out what the science actually says.
Researchers combined 57 separate studies involving more than 160,000 adults. They discovered that 7,000 steps a day is where the health benefits maxed out, and walking more than that didn't seem to add much. The researchers found that even modest increases—going from around 2,000 to 4,000 steps daily—made a meaningful difference in health outcomes.
"Reaching 7,000 steps a day was linked to a 47% lower risk of dying early," the review found. It also showed a 25% lower risk of heart disease and stroke, a 14% lower risk of type 2 diabetes, a 38% lower risk of dementia, a 22% lower risk of depression, and a 28% lower risk of falls.
The good news? You don't need to hit some magic number to see results. The research shows benefits start well before 7,000 steps. After that point, the gains start to flatten out.
One tip from the research: walking faster helps. Brisk walking that makes conversation a little harder qualifies as "moderate intensity" exercise. If you pick up the pace even more—where you can only say a few words before getting out of breath—you'll get bigger health benefits in less time.
Walking alone, though, doesn't cover everything. It doesn't build muscle strength, which becomes increasingly important as people age. That's why most health experts recommend adding strength training—like lifting weights—at least two days a week.
So next time someone says you need 10,000 steps, you can smile and know that 7,000 is a perfectly good goal—and 2,000 to 4,000 to start is better than nothing.