4000 may be enough "The 10,000-step myth: How a marketing gimmick shaped global health for decades –" NaturalNews.com

https://www.naturalnews.com/2025-10-01-10k-step-myth-marketing-gimmick-shaped-global-health.html 

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The research demonstrates that you do not need to leap from couch potato to 10,000-step enthusiast overnight. Simply moving from a baseline of 2,000 steps to 4,000 steps a day was linked to a 36 percent lower risk of early death.."