An increase in physical activity between the ages of 45 and 65 could help prevent Alzheimer's disease. Even people who did less physical activity than recommended had greater cortical thickness than sedentary people, suggesting that any amount of exercise, no matter how minimal, has health benefits

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3. An increase in physical activity between the ages of 45 and 65 could help prevent Alzheimer's disease. Even people who did less physical activity than recommended had greater cortical thickness than sedentary people, suggesting that any amount of exercise, no matter how minimal, has health benefits