古希腊名医希波克拉底曾说“步行是人类最好的良药”，这一说法虽存争议却道出了部分事实：步行免费、无需器械且易于融入日常生活。传统观念认为每天走10000步是良好的目标，但这一数字并非源于临床试验，而是来自1964年东京奥运会前夕日本推出的一项计步器广告宣传（日语汉字中的“万”字形似人行走）。尽管热衷步行的人无需回避10000步的目标，但从科学研究来看，这一数字几乎站不住脚。

2025年发表在《柳叶刀-公共卫生》（Lancet Public Health）上的一项研究综合分析了2014年以来的57篇论文，评估了每日步数与健康结果之间的联系。结果显示多走路普遍有益：与每天走2000步相比，每天走7000步可将过早死亡风险降低47%，心血管疾病风险降低25%，糖尿病风险降低14%；即便从每天2000步增加到4000步，也能使追踪期内的死亡风险下降36%。然而，领导该研究的悉尼大学流行病学家Melody Ding指出，大多数健康收益在7000步之后会出现投资回报递减，例如从每天7000步增加到10000步，死亡风险仅进一步降低2%。

除了步数，科学家通常用步频（每分钟步数）来量化步行强度。尽管最佳步频的证据较难精确界定，但体育科学普遍认为能够提高心率或让人微微气喘的更高强度运动更有益。墨尔本莫纳什大学的Emmanuel Stamatakis及其同事在9月份的《英国运动医学杂志》上发表研究，利用英国生物样本库（UK Biobank）的数据对64743名参与者进行了约八年的追踪。结果发现，每天快走不足5000步的人，其死亡风险的平均降幅与每天走5000至7500步的人相似。由于步频同样受边际收益递减规律影响，该论文建议最佳标准是每天走7500至10000步，并经常穿插每分钟100步的快走冲刺；对于没时间多走路的人，可以把车停在超市所在街区外再快步走进去。

Although the famous quote attributed to Hippocrates that “walking is man’s best medicine” is disputed, walking remains a free, equipment-free exercise easy to incorporate into daily life. Conventional wisdom recommends a target of 10,000 steps per day, yet this figure originated not from a clinical trial, but from a Japanese pedometer advertising campaign ahead of the 1964 Tokyo Olympics, partly because the Japanese Kanji character for 10,000 resembles a walking person. While 10,000 steps is harmless for enthusiasts, it lacks a specific scientific basis.

A 2025 study published in Lancet Public Health, led by University of Sydney epidemiologist Melody Ding, analysed 57 papers published since 2014 to evaluate how daily step counts affect health. Walking more proved broadly beneficial: compared with 2,000 steps a day, taking 7,000 steps reduced the risk of premature death by 47%, cardiovascular disease by 25%, and diabetes by 14%, while even increasing from 2,000 to 4,000 daily steps lowered mortality risk by 36%. However, health returns diminish sharply after 7,000 steps; jumping from 7,000 to 10,000 daily steps yielded only an additional 2% reduction in mortality risk.

Intensity, measured by cadence or steps per minute, also matters, as sports science indicates that raising one’s heart rate and getting slightly out of breath brings added benefits. In a September British Journal of Sports Medicine paper, Emmanuel Stamatakis of Monash University and colleagues tracked 64,743 UK Biobank participants for roughly eight years and found that faster cadences were similarly advantageous: participants walking fewer than 5,000 brisk steps daily achieved an average mortality risk reduction comparable to those walking 5,000 to 7,500 steps at a normal pace. Accounting for diminishing returns in both metrics, the study identifies the sweet spot as 7,500 to 10,000 daily steps combined with frequent bursts at 100 steps per minute, suggesting that busy people create opportunities like parking a block away from the supermarket and briskly walking in.

Source: Do you need to walk 10,000 steps a day?

Subtitle: How fast you walk may be as important as how much

Dateline: Oct 15th 2026\n