Our modern-day lifestyle encourages behaviors that are bad for the health of our brain as well as other parts of our body. Research finds the following four habits are especially dangerous for cognitive health. They are sitting, lack of socializing, inadequate sleep, and chronic stress. The good news is they are habits we can easily change.
Many of our workplaces and entertainment pursuits include sitting for long periods of time. In fact, a 2018 study published in the PLOS One reports people aged 45 to 75 sit for an average of 6½ hours a day. Researchers found “sitting too much is linked to changes in a section of the brain essential to memory.” Using MRI scans, they looked at the region of the brain known to make new memories called the medial temporal lobe (MTL). Comparing the number of hours a day the person spent sitting, those who sat the most had the thinnest MTL regions, a precursor to cognitive decline and dementia. To help improve the functioning of your MTL, the study’s authors recommend getting up and moving at least every 30 minutes. Your activity could be a quick round of squats or pushups or a walk around your front yard, or something similar for a few minutes.
Lack of socialization can also lead to a thinning of the MTL as a number of studies link loneliness to a higher risk of dementia. Experts say you don’t have to completely change your lifestyle but rather try to routinely connect with three or four family members or friends. The number of social connections is less important than the degree of meaningful interactions.
Other healthy cognitive behaviors include getting at least seven to eight hours of sleep each night and reducing your level of stress. Research shows chronic stress “can kill brain cells and shrink the prefrontal cortex, the area responsible for memory and learning.” To manage stress, experts suggest breathing techniques and practicing mindfulness.
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Source: health.harvard.edu/mind-and-mood/the-worst-habits-for-your-brain
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