详细内容（全部2条）

1. 阿尔茨海默病可能在斑块出现之前很久就在大脑中​​留下痕迹。

• ✍️ 作者：未知作者
• 🏷️ 关键词：Alzheimer
• 📝 描述：Brain changes associated with Alzheimer’s may begin at least seven years before amyloid plaques become detectable with current PET scans. Researchers uncovered the signal by tracking healthy older adults with repeated brain imaging over nearly 20 years. The discovery could help scientists identify Alzheimer’s earlier and suggests that important disease processes may start before visible plaque buildup.
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2. 长时间久坐每增加一小时，癌症死亡风险就会增加9%。

• ✍️ 作者：未知作者
• 🏷️ 关键词：cancer
• 📝 描述：Sitting for long, uninterrupted stretches may carry greater health risks than sitting the same amount of time in shorter bouts. Researchers found that each extra hour of prolonged sedentary behavior was associated with a 9% higher risk of cancer death. Breaking up sitting with movement showed the opposite pattern, while replacing an hour of prolonged sitting with light activity was linked to a 12% lower risk.
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