Walking: A Simple Way to Protect Your Brain
As people grow older, the slowdown or even decline of cognitive function is almost inevitable. But is there any simple way to slow it down? The answer may surprise you—it’s walking. Yes, it’s that easy. Harvard Medical School proved through a 14-year study that walking 5,000 to 7,500 steps every day can slow down cognitive decline.
Wait—can walking really protect the brain? You might think it’s a common saying. But this Harvard study has new findings. The research team tracked nearly 300 elderly people and used PET scans to continuously monitor their brain changes, just like installing surveillance cameras in the brain. Fourteen years later, they found that sticking to walking every day indeed slows down cognitive decline. Especially for those whose brains have shown signs of decline, walking daily makes their cognitive function decline much more slowly.
But through which channel does walking protect the brain?
In the past, scientists focused on beta-amyloid, the main suspect. But this study found no significant correlation between the number of daily steps and the accumulation rate of beta-amyloid. Instead, there is a clearer connection with another type of protein—Tau protein.
You can understand it this way: Beta-amyloid is like a cigarette butt in a forest, while Tau protein may be the real forest fire—it directly burns the internal structure of neurons and causes the collapse of cognitive networks. Walking, however, is the fire brigade that delays the spread of the fire.
What is the best number of steps to take every day? The golden range is 5,000-7,500 steps. The study found that compared with the sedentary group (less than 3,000 steps), people who walk more than 5,000 steps every day can delay cognitive decline by 3 to 7 years. But after exceeding 7,500 steps, the benefits tend to level off, meaning there’s no need to push for 10,000 steps.
In today’s lifestyle, insufficient sleep and prolonged sitting accelerate the accumulation of brain waste like beta-amyloid and Tau protein. To protect your brain, just start walking more in daily life.
5,000 steps a day may seem trivial, but over decades, it is equivalent to depositing cognitive compound interest for your brain.
阅读理解
1. According to Harvard’s 14-year study, walking can help people ______.
A. increase the number of neurons
B. slow down brain cognitive decline
C. improve sleep quality effectively
D. reduce the risk of serious diseases
2. What did the research team use to monitor the brain changes of the elderly?
A. Blood tests.
B. PET scans.
C. Physical examinations.
D. Daily activity records.
3. What is the role of Tau protein according to the passage?
A.It helps repair the internal structure of neurons.
B. It delays the spread of harmful substances.
C. It directly damages the internal structure of neurons.
D. It has no connection with cognitive decline.
4.How many years can walking 5,000+ steps delay cognitive decline?
A. 2-5 years.
B. 3-7 years.
C. 5-10 years.
D. 7-12 years.
5. Which of the following is TRUE?
A. The more steps, the better.
B. 3,000 steps is the best choice.
C.7,500 steps work better than 10,000 steps.
D.5,000-7,500 steps is the most effective range.
答案：1. B 2. B 3. C 4. B 5. D
词汇积累
1. accumulation /əˌkjuːmjəˈleɪʃn/ n. 积累；堆积
2. accumulate /əˈkjuːmjəleɪt/ v. 积累；堆积
3. As people grow older, the slowdown or even decline of cognitive function is almost inevitable.
随着年龄增长，认知功能的衰退甚至下降几乎是不可避免的。
4. be equivalent to 相当于；等同于
5. cognitive /ˈkɒɡnətɪv/ adj. 认知的
6. cognitive compound interest
认知复利
7. collapse /kəˈlæps/ v. 倒塌；崩溃
8. compared with 与……相比
9. Compared with the sedentary group (less than 3,000 steps), people who walk more than 5,000 steps every day can delay cognitive decline by 3 to 7 years.
与久坐组（少于3000步）相比，每天走5000步以上的人，认知衰退可推迟3-7年。
10. decline /dɪˈklaɪn/ n. & v. 衰退；下降
11. focus on 聚焦于；关注
12. grow older 随着年龄增长
13. level off 趋于平稳；不再上升
14. monitor /ˈmɒnɪtə(r)/ v. 监测；监控
15. neuron /ˈnjʊərɒn/ n. 神经元
16. prove that… 证明……
17. sedentary /ˈsedntri/ adj. 久坐的
18. slow down 减缓；放慢
19. structure /ˈstrʌktʃə(r)/ n. 结构；构造
20. suspect /ˈsʌspekt/ n. 嫌疑犯；可疑对象
21. The research team tracked nearly 300 elderly people and used PET scans to continuously monitor their brain changes, just like installing surveillance cameras in the brain.
研究团队追踪近300名老人，用PET扫描持续监测大脑变化，就像在大脑里装了监控。
22. You can understand it this way: Beta-amyloid is like a cigarette butt in a forest, while Tau protein may be the real forest fire—it directly burns the internal structure of neurons and causes the collapse of cognitive networks.
你可以这样理解：β-淀粉样蛋白像森林里的烟头，而Tau蛋白才是真正的森林大火，直接烧毁神经元结构，导致认知网络崩溃。
