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Exercise, Stress, and the Brain

Exercise, Stress, and the Brain

Exercise is interesting in terms of effects on the brain, because it works in about 4 or 5 different ways.

One of the most obvious ways is blood flow. So, if you get your heart working, your brain is going to be filled with oxygen, rich blood and nutrients. So that’s the main way that we thought it helps The other way.

Thats sort of interesting is it’s been thought that exercise produces new neurons, So exercise induces the production of growth factors, one’s called BDNF and it actually stimulates the production of new brain cells.

Now, when I was in school 20 years ago, we were told you can’t get any new brain cells. So when you’re born thats your lot, you’re not going to make any more But more recently, we’ve found that exercise is a really good way of stimulating brain cell production, And some of these are functional, And so just this notion that something that you can do can generate new brain cells is a really great thing to think about. We were wondering why exercise helps the brain, and what one theory is that it just reduces stress.

So maybe it’s not that blood is coming to the brain, Maybe you’re less stressed, And that was something that imaging allowed us to test. And so we scanned a whole lot of people with high cortisol levels. And so, if you’re stressed, if you’re angry about something or even if you’re stuck in traffic, your cortisol levels can be very high.

One of the things we found is that the people with high cortisol levels lost brain tissue, faster Well, that’s a serious problem. So as soon as you know, that’s true, you can look at ways of reducing your cortisol and so that’s a very easy thing to do. We can get less stressed by exercising walking, taking breaks And so imaging established a physical connection between something in your blood cortisol. Thats a sign of stress and actual physical changes in the brain and that’s very useful to know. Take care of your brain There’s a lot of ways.

We know that you can take care of your brain.

You can eat a good diet, you can exercise, you can reduce stress, you can make sure you’re well educated, and these things just build up.

A sort of mental bank account for the future, and so, even though it seems like work is hard.

You’re building a store of brain connections that you’ll need them for the rest of your life, So these are practical messages that we’ve learned from imaging a lot of people.

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