Exercise and Brain Health
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Numerous scientific studies have found a link between exercise and brain health. Our cognition (our awareness, perception, reasoning and judgement) is more likely to be maintained, if we exercise throughout our lives. Impaired cognition is what we associate most with the symptoms of dementia.
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A study I found while researching this article demonstrates the effect of exercise well. At the start of the study the cognitive ability of all the participants was tested. The participants would then come in for semi-regular check-ups over a 12 year period of their lives. Around half of the participants stated they regularly exercised while the other half were more sedentary.
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I bet you can guess where this is going ….
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After the 12 years, those who exercised regularly showed 38% less chance of displaying weakened cognition. Even low to moderate exercise was shown to have a 35% decrease in risk of impaired cognition.
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The conclusion of this study was: ANY level of physical activity will have a “significant and consistent impact against the occurrence of cognitive decline”. [1]
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What does that mean for us? To put it simply:
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As physical activity goes up, the risk of dementia goes down. [2]
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It’s not just about BRAIN HEALTH:
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There is more to exercise than just the health of your brain. Regular exercise keeps your stability and strength up as you age. This means there is a much greater chance of falling.
This is highly relevant to dementia as people who are less mobile tend to stay home more. And they miss out on even more physical and social activity by staying in. This only further increases the risk of developing issues in the brain.
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The Role of Inflammation
The link between inflammation and dementia has been a hot topic with scientists for many years now[3]
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Despite what you mean think, Inflammation is a part of our natural functions. It’s the response of the immune system when it detects invaders or trauma. These invaders might be a bacterial infection or even a physical object, like a splinter in the finger. When we have an infection, we get a temperature. This is part of the immune response, or inflammation, helping the body to fight the attacker.
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Example: If you cut yourself, the area goes warm and red.
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The issue is when inflammation becomes chronic. To put it simply, it’s when the body “over does it”. In these cases the immune system is ringing every alarm bell it can and mobilising all it’s troops… which can lead it to attacking healthy parts of the body.
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If the immune system isn’t in good health, it won’t be able to switch off the immune response, and gradually, chronic inflammation can occur.