A study tracking 20,950 adults aged 40 and older in Osaka, Japan, found that predicted healthcare costs stopped declining in any clear way after roughly 10,000 to 11,000 daily steps, according to researchers.
The observational study analyzed data from a public health app and health insurance claims over 36 months, and its strongest single estimate was 10,893 steps per day, the study stated. Researchers said the findings do not prove that hitting a specific step count directly lowers medical expenses.
The results add to a growing body of walking research that has questioned rigid step targets.
Study Methodology and Data Sources
Researchers analyzed data from 20,950 adults aged 40 and older in Osaka, Japan, who had used a public health app for at least one year, according to the study. The app automatically tracked daily steps, which researchers linked to health insurance claims to estimate healthcare costs over 36 months.
A statistical model was used to identify where the relationship between step counts and costs began to flatten, rather than assuming every additional step offered the same benefit. Earlier research linking activity to lower healthcare costs mostly relied on self-reported exercise, which made it difficult to see where benefits might level off, the study stated.
The reliance on objectively tracked steps rather than self-reported exercise follows a pattern seen elsewhere in walking research. A Norwegian study involving more than 11,000 adults used objective motion-sensing devices instead of self-reported data and concluded that total volume of walking was more important than intensity or speed [1].
Predicted Costs and Step Count Ranges
Predicted healthcare costs dropped as daily steps increased, particularly at lower activity levels, according to the study. The decline eventually leveled off, with the lowest-cost range starting around 10,000 to 11,000 steps a day, researchers said.
Adults aged 40 to 64 had a lowest-cost range centered around 11,317 steps, compared with 10,612 steps for adults 65 and older, the study stated. Although older adults had higher healthcare costs overall, their estimated step-count range was nearly the same, according to the study.
The model also suggested a possible low point around 19,000 to 20,000 steps, but few participants walked that much, and predicted costs at that level could not be reliably distinguished from the 10,000-to-11,000 range. Researchers could not establish that walking more offered additional cost-related benefits, according to the study. The pattern is consistent with other research suggesting the relationship between movement and health outcomes is not strictly linear: a large-scale study of more than 85,000 adults found that increasing daily step counts was associated with a meaningful reduction in overall cancer risk, according to the study [2].
Limitations and Observational Nature
The research was observational, meaning researchers tracked existing behaviors rather than assigning people different walking routines, according to the study. That design limits what the results can show about cause and effect.
The study examined predicted healthcare costs, not every possible benefit of walking, and it cannot prove that reaching a particular step count directly lowers medical expenses, researchers said. Participants had voluntarily downloaded and consistently used a health app for years, potentially making them more health-conscious than the general population, the report stated.
Researchers said the findings suggest that, in this group, predicted healthcare costs stopped dropping in any clear way beyond 10,000 to 11,000 daily steps, but that this range is not a magic ceiling. That caution mirrors language used in other walking research, where observational designs have similarly been described as unable to prove that walking faster or taking more steps prevented deaths [3]. Separately, a randomized trial involving 105 participants in retirement communities reported that a high-intensity walking group showed more improvement in frailty than a comfortable-pace group, though researchers noted the findings were limited [4].
Conclusion: Maintainable Movement and Cost Findings
If already averaging around 10,000 steps, there is little reason to push to 15,000 just to hit a higher number, according to the study. For less active individuals, the steepest drop in predicted healthcare costs appeared at lower activity levels, researchers said.
Suggested ways to add movement include walking after meals, breaking up sitting time, and increasing step counts gradually, according to the study.
The goal is to find a walking routine that can be maintained, not turn every outing into a step-count competition, the report stated.
References
- The daily walk A simple prescription for a nation in pain - NaturalNews.com, September 10, 2025
- Large-Scale Study Links Increased Daily Movement to Reduced Cancer Risk. https://www.naturalnews.com/2026-04-17-study-links-increased-daily-movement-reduced-cancer-risk.html
- Can't Hit 10000 Steps? How Fast You Walk May Matter More. https://www.nationalgeographic.com/health/article/walking-pace-step-count-health
- Randomized Trial Finds Faster Walking Pace Tied to Greater Frailty Improvement. https://www.naturalnews.com/2026-10-04-rct-faster-walking-pace-linked-frailty-improvement.html
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