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Study with Nearly 2,000 Elderly Shows That Reading, Writing, and Language Learning Strengthen Cognitive Reserve and Can Delay Symptoms of Dementia by Up to Seven Years, According to Data Published in the Journal Neurology
Maintaining habits such as frequent reading, regular writing, and lifelong language learning can significantly reduce the risk of Alzheimer’s. A new scientific study indicates that these practices are associated with a reduction of up to 38% in the risk of developing the disease in old age. Furthermore, the data suggest that ongoing engagement in cognitive activities may delay Alzheimer’s by up to five years.
The information was released by the portal “Metrópoles,” based on a study conducted by Rush University Medical Center in the United States, published in the scientific journal Neurology on February 11. According to researchers, the so-called “cognitive enrichment” throughout life plays a crucial role in preserving brain health.
How Intellectual Habits Reduce the Risk of Alzheimer’s
According to the research, people who maintained constant contact with intellectually stimulating activities since childhood had 38% less risk of developing Alzheimer’s disease and 36% less risk of mild cognitive impairment.
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Moreover, the data indicate that continuous practice of reading and language-related activities can delay Alzheimer’s by up to five years and mild cognitive impairment by up to seven years. In other words, the impact goes beyond prevention: it also influences the timing of symptom onset.
The researchers’ central hypothesis is that intellectual stimulation strengthens neural connections and contributes to the formation of a “cognitive reserve.” In other words, the brain develops a kind of extra protection against the damage caused by aging and the accumulation of proteins associated with the disease.
“Our results suggest that cognitive health in old age is strongly influenced by exposure throughout life to intellectually stimulating environments,” said neuropsychologist Andrea Zammit, one of the study’s authors.
Study Followed 1,939 People for Nearly Eight Years
To reach these conclusions, scientists followed 1,939 participants, with an average age of 80 years at the start of the research, for nearly eight years. During this period, volunteers answered questionnaires about their intellectual habits at three life stages: at 12 years, at 40 years, and at their current age.
Based on the responses, researchers created a cognitive enrichment scale. This score assessed the level of exposure, throughout life, to activities that stimulate the brain.
Among the factors analyzed were:
- Frequency of reading books
- Writing habits
- Learning foreign languages
- Use of dictionaries
- Participation in cultural environments, such as libraries and museums
The more regular and longer these practices, the higher the participant’s score on the scale.
Additionally, researchers assessed the socioeconomic level (SEL) of each volunteer, considering education, income, and access to educational resources. The goal was to verify whether the lower risk of dementia could be explained solely by better financial conditions.
However, even after adjusting the data for SEL, the protective effect of cognitive enrichment remained significant. Therefore, the benefit is not limited to income or formal education.
Biological Evidence Reinforces the Theory of Cognitive Reserve
Another important aspect of the study involves the analysis of brain tissue from participants who passed away during the follow-up. Researchers observed that individuals with greater intellectual stimulation in childhood showed greater resistance to the accumulation of proteins associated with Alzheimer’s.
This finding suggests a possible biological effect of the so-called cognitive reserve. In other words, beyond the statistical association, a physical mechanism may exist that protects the brain.
Currently, Alzheimer’s affects between 1.2 million and 1.8 million people in Brazil, responsible for 55% to 60% of dementias in the elderly. In light of this scenario, prevention strategies gain increasing relevance.
Still, scientists warn that the study indicates a strong association, but does not prove a direct cause-and-effect relationship. In other words, it is not possible to assert that reading books alone will prevent the development of the disease.
Moreover, other factors influence the risk of Alzheimer’s, such as sleep quality, physical activity, balanced diet, and control of chronic diseases. Part of the data also relied on the participants’ own memories of habits maintained decades earlier.
Even with these limitations, the study reinforces a clear message: keeping the brain active throughout life can reduce the risk of Alzheimer’s and preserve cognition in old age.
In light of this, the authors advocate for public policies aimed at promoting continuous learning, such as expanding libraries and educational programs. After all, investing in education throughout life may be one of the most accessible strategies to combat dementia in the future.
What about you, do you maintain any reading or learning habits that stimulate your brain every day?
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