The Exercise That Protects Your Brain

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The Neuroscientist In The Gym

This is Dr. Wendy Suzuki. She’s a neuroscientist, and an expert in the neurobiology of memory, as well as neuroplasticity, and the role of exercise in neuroprotection.

We’ve sneakily semi-featured her before when we shared her Big Think talk:

Brain Benefits In Three Months… Through Walking?

Today we’re going to expand on that a little!

A Quick Recap

To share the absolute key points of that already fairly streamlined rundown:

  • Exercise boosts levels of neurotransmitters such as dopamine and serotonin (and, which wasn’t mentioned there, noradrenaline)
    • These are responsible for motivation, happiness, and focus (amongst other things)
  • Persistent exercise boosts certain regions of the brain in particular, most notably the pre-frontal cortex and the hippocampi*
    • These are responsible for planning and memory (amongst other things)

Dr. Suzuki advocates for stepping up your exercise routine if you can, with more exercise generally being better than less (unless you have some special medical reason why that’s not the case for you).

*often referred to in the singular as the hippocampus, but you have one on each side of your brain (unless a serious accident/incident destroyed one, but you’ll know if that applies to you, unless you lost both, in which case you will not remember about it).

What kind(s) of workout?

While a varied workout is best for overall health, for these brain benefits specifically, what’s most important is that it raises your heart rate.

This is why in her Big Think talk we shared before, she talks about the benefits of taking a brisk walk daily. See also:

Walking, Better

If that’s not your thing, though (and/or is for whatever reason an inaccessible form of exercise for you), there is almost certainly some kind of High Intensity Interval Training that is a possibility for you. That might sound intimidating, but if you have a bit of floor and can exercise for one minute at a time, then HIIT is an option for you:

How To Do HIIT (Without Wrecking Your Body)

Dr. Suzuki herself is an ardent fan of “intenSati” which blends cardio workouts with yoga for holistic mind-and-body fitness. In fact, she loves it so much that she became a certified exercise instructor:

Wendy Suzuki | IntenSati

How much is enough?

It’s natural to want to know the minimum we can do to get results, but Dr. Suzuki would like us to bear in mind that when it comes to our time spent exercising, it’s not so much an expense of time as an investment in time:

❝Exercise is something that when you spend time on it, it will buy you time when you start to work❞

~ Dr. Wendy Suzuki

Read more: A Neuroscientist Experimented on Her Students and Found a Powerful Way to Improve Brain Function

Ok, but we really want to know how much!

Dr. Suzuki recommends at least three to four 30-minute exercise sessions per week.

Note: this adds up to less than the recommended 150 minutes of moderate exercise per week, but high-intensity exercise counts for twice the minutes for these purposes, e.g. 1 minute of high-intensity exercise is worth 2 minutes of moderate exercise.

How soon will we see benefits?

Benefits start immediately, but stack up cumulatively with continued long-term exercise:

❝My lab showed that a single workout can improve your ability to shift and focus attention, and that focus improvement will last for at least two hours. ❞

~ Dr. Wendy Suzuki

…which is a great start, but what’s more exciting is…

❝The more you’re working out, the bigger and stronger your hippocampus and prefrontal cortex gets. Why is that important?

Because the prefrontal cortex and the hippocampus are the two areas that are most susceptible to neurodegenerative diseases and normal cognitive decline in aging. ❞

~ Dr. Wendy Suzuki

In other words, while improving your heart rate through regular exercise will help prevent neurodegeneration by the usual mechanism of reducing neuroinflammation… It’ll also build the parts of your brain most susceptible to decline, meaning that when/if decline sets in, it’ll take a lot longer to get to a critical level of degradation, because it had more to start with.

Read more:

Inspir Modern Senior Living | Dr. Wendy Suzuki Boosts Brain Health with Exercise

Want more from Dr. Suzuki?

You might enjoy her TED talk:

Click Here If The Embedded Video Doesn’t Load Automatically

Prefer text? TED.com has a transcript for you

Prefer lots of text? You might like her book, which we haven’t reviewed yet but will soon:

Healthy Brain, Happy Life: A Personal Program to Activate Your Brain and Do Everything Better – by Dr. Wendy Suzuki

Enjoy!

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Recommended

  • How (And Why) To Train Your Pre-Frontal Cortex
  • Adult Children of Emotionally Immature Parents – by Dr. Lindsay Gibson
    Healing from emotionally difficult parents: understand, assess, and rebuild with Dr. Gibson’s anecdotes, science, and practical tools.

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  • The Sweet Truth About Diabetes

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    There’s A Lot Of Confusion About Diabetes!

    For those readers who are not diabetic, nor have a loved one who is diabetic, nor any other pressing reason to know these things, first a quick 101 rundown of some things to understand the rest of today’s main feature:

    • Blood sugar levels: how much sugar is in the blood, measured in mg/dL or mmol/L
    • Hyperglycemia or “hyper” for short: too much sugar in the blood
    • Hypoglycemia or “hypo” for short: too little sugar in the blood
    • Insulin: a hormone that acts as a gatekeeper to allow sugar to pass, or not pass, into various parts of the body
    • Type 1 diabetes (sometimes capitalized, and/or abbreviated to “T1D”) is an autoimmune disorder that prevents the pancreas from being able to supply the body with insulin. This means that taking insulin consistently is necessary for life.
    • Type 2 diabetes is a matter of insulin resistance. The pancreas produces plenty of insulin, but the body has become desensitized to it, so it doesn’t work properly. Taking extra insulin may sometimes be necessary, but for many people, it can be controlled by means of a careful diet and other lifestyle factors.

    With that in mind, on to some very popular myths…

    Diabetes is caused by having too much sugar

    While sugar is not exactly a health food, it’s not the villain of this story either.

    • Type 1 diabetes has a genetic basis, triggered by epigenetic factors unrelated to sugar.
    • Type 2 diabetes comes from a cluster of risk factors which, together, can cause a person to go through pre-diabetes and acquire type 2 diabetes.
      • Those risk factors include:
        • A genetic predisposition
        • A large waist circumference
          • (this is more relevant than BMI or body fat percentage)
        • High blood pressure
        • A sedentary lifestyle
        • Age (the risk starts rising at 35, rises sharply at 45, and continues upwards with increasing age)

    Read more: Risk Factors for Type 2 Diabetes

    Diabetics can’t have sugar

    While it’s true that diabetics must be careful about sugar (and carbs in general), it’s not to say that they can’t have them… just: be mindful and intentional about it.

    • Type 1 diabetics will need to carb-count in order to take the appropriate insulin bolus. Otherwise, too little insulin will result in hyperglycemia, or too much insulin will result in hypoglycemia.
    • Type 2 diabetics will often be able to manage their blood sugar levels with diet alone, and slow-release carbs will make this easier.

    In either case, having quick release sugars will increase blood sugar levels (what a surprise), and sometimes (such as when experiencing a hypo), that’s what’s needed.

    Also, when it comes to sugar, a word on fruit:

    Not all fruits are equal, and some fruits can help maintain stable blood sugar levels! Read all about it:

    Fruit Intake to Prevent and Control Hypertension and Diabetes

    Artificial sweeteners are must-haves for diabetics

    Whereas sugar is a known quantity to the careful diabetic, some artificial sweeteners can impact insulin sensitivity, causing blood sugars to behave in unexpected ways. See for example:

    The Impact of Artificial Sweeteners on Body Weight Control and Glucose Homeostasis

    If a diabetic person is hyper, they should exercise to bring their blood sugar levels down

    Be careful with this!

    • In the case of type 2 diabetes, it may (or may not) help, as the extra sugar may be used up.
    • Type 1 diabetes, however, has a crucial difference. Because the pancreas isn’t making insulin, a hyper (above a certain level, anyway) means more insulin is needed. Exercising could do more harm than good, as unlike in type 2 diabetes, the body has no way to use that extra sugar, without the insulin to facilitate it. Exercising will just pump the syrupy hyperglycemic blood around the body, potentially causing damage as it goes (all without actually being able to use it).

    There are other ways this can be managed that are outside of the scope of this newsletter, but “be careful” is rarely a bad approach.

    Read more, from the American Diabetes Association:

    Exercise & Type 1 Diabetes

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  • Chili Chestnut, Sweet Apricot, & Whipped Feta Toasts

    10almonds is reader-supported. We may, at no cost to you, receive a portion of sales if you purchase a product through a link in this article.

    This is a delightful breakfast or light lunch option, full of gut-healthy ingredients and a fair list of healthy polyphenols too.

    You will need

    • ½ baguette, sliced into ½” slices; if making your own, feel free to use our Delicious Quinoa Avocado Bread recipe. If buying shop-bought, a sourdough baguette will likely be the healthiest option, and tasty too.
    • 4 oz feta cheese; if you are vegan, a plant-based version will work in culinary terms, but will have a different (less gut-healthy) nutritional profile, as plant-based cheeses generally use a lot of coconut oil and potato starch, and are not actually fermented.
    • 1 tbsp yogurt; your preference what kind; live-cultured with minimal additives is of course best—and this time, plant-based is also just as good, healthwise, since they are fermented and contain more or less the same beneficial bacteria, and have a good macro profile too.
    • 4 oz precooked chestnuts, finely chopped
    • 6 dried apricots, finely chopped
    • ¼ bulb garlic, grated
    • 2 tsp harissa paste
    • 1 tsp black pepper, coarse ground
    • ¼ tsp MSG or ½ tsp low-sodium salt
    • Extra virgin olive oil, for frying
    • Optional garnish: finely chopped chives

    Method

    (we suggest you read everything at least once before doing anything)

    1) Combine the feta and yogurt in a small, high-speed blender and process into a smooth purée. If it isn’t working, add 1 tbsp kettle-hot water and try again.

    2) Heat the oil in a skillet over a medium heat; add the garlic and when it starts to turn golden, add the chestnuts and harissa, as well as the black pepper and MSG/salt. Stir for about 2 minutes, and then stir in the apricots and take it off the heat.

    3) Toast the baguette slices under the grill. If you’re feeling bold about the multitasking, you can start this while still doing the previous step, for optimal timing. If not, simply doing it in the order presented is fine.

    4) Assemble: spread the whipped feta over the toast; add the apricot-chestnut mixture, followed by the finely chopped chives if using, and serve immediately:

    Enjoy!

    Want to learn more?

    For those interested in some of the science of what we have going on today:

    Take care!

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  • The Autoimmune Cure – by Dr. Sara Gottfried

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    We’ve featured Dr. Gottfried before, as well as another of her books (“Younger”), and this one’s a little different, and on the one hand very specific, while on the other hand affecting a lot of people.

    You may be thinking, upon reading the subtitle, “this sounds like Dr. Gabor Maté’s ideas” (per: “When The Body Says No”), and 1) you’d be right, and 2) Dr. Gottfried does credit him in the introduction and refers back to his work periodically later.

    What she adds to this, and what makes this book a worthwhile read in addition to Dr. Maté’s, is looking clinically at the interactions of the immune system and nervous system, but also the endocrine system (Dr. Gottfried’s specialty) and the gut.

    Another thing she adds is more of a focus on what she writes about as “little-t trauma”, which is the kind of smaller, yet often cumulative, traumas that often eventually add up over time to present as C-PTSD.

    While “stress increases inflammation” is not a novel idea, Dr. Gottfried takes it further, and looks at a wealth of clinical evidence to demonstrate the series of events that, if oversimplified, seem unbelievable, such as “you had a bad relationship and now you have lupus”—showing evidence for each step in the snowballing process.

    The style is a bit more clinical than most pop-science, but still written to be accessible to laypersons. This means that for most of us, it might not be the quickest read, but it will be an informative and enlightening one.

    In terms of practical use (and living up to its subtitle promise of “cure”), this book does also cover all sorts of potential remedial approaches, from the obvious (diet, sleep, supplements, meditation, etc) to the less obvious (ketamine, psilocybin, MDMA, etc), covering the evidence so far as well as the pros and cons.

    Bottom line: if you have or suspect you may have an autoimmune problem, and/or would just like to nip the risk of such in the bud (especially bearing in mind that the same things cause neuroinflammation and thus, putatively, depression and dementia too), then this is one for you.

    Click here to check out the Autoimmune Cure, and take care of your body and mind!

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Related Posts

  • How (And Why) To Train Your Pre-Frontal Cortex
  • From banning junk food ads to a sugar tax: with diabetes on the rise, we can’t afford to ignore the evidence any longer

    10almonds is reader-supported. We may, at no cost to you, receive a portion of sales if you purchase a product through a link in this article.

    There are renewed calls this week for the Australian government to implement a range of measures aimed at improving our diets. These include restrictions on junk food advertising, improvements to food labelling, and a levy on sugary drinks.

    This time the recommendations come from a parliamentary inquiry into diabetes in Australia. Its final report, tabled in parliament on Wednesday, was prepared by a parliamentary committee comprising members from across the political spectrum.

    The release of this report could be an indication that Australia is finally going to implement the evidence-based healthy eating policies public health experts have been recommending for years.

    But we know Australian governments have historically been unwilling to introduce policies the powerful food industry opposes. The question is whether the current government will put the health of Australians above the profits of companies selling unhealthy food.

    benjamas11/Shutterstock

    Diabetes in Australia

    Diabetes is one of the fastest growing chronic health conditions in the nation, with more than 1.3 million people affected. Projections show the number of Australians diagnosed with the condition is set to rise rapidly in coming decades.

    Type 2 diabetes accounts for the vast majority of cases of diabetes. It’s largely preventable, with obesity among the strongest risk factors.

    This latest report makes it clear we need an urgent focus on obesity prevention to reduce the burden of diabetes. Type 2 diabetes and obesity cost the Australian economy billions of dollars each year and preventive solutions are highly cost-effective.

    This means the money spent on preventing obesity and diabetes would save the government huge amounts in health care costs. Prevention is also essential to avoid our health systems being overwhelmed in the future.

    What does the report recommend?

    The report puts forward 23 recommendations for addressing diabetes and obesity. These include:

    • restrictions on the marketing of unhealthy foods to children, including on TV and online
    • improvements to food labelling that would make it easier for people to understand products’ added sugar content
    • a levy on sugary drinks, where products with higher sugar content would be taxed at a higher rate (commonly called a sugar tax).

    These key recommendations echo those prioritised in a range of reports on obesity prevention over the past decade. There’s compelling evidence they’re likely to work.

    Restrictions on unhealthy food marketing

    There was universal support from the committee for the government to consider regulating marketing of unhealthy food to children.

    Public health groups have consistently called for comprehensive mandatory legislation to protect children from exposure to marketing of unhealthy foods and related brands.

    An increasing number of countries, including Chile and the United Kingdom, have legislated unhealthy food marketing restrictions across a range of settings including on TV, online and in supermarkets. There’s evidence comprehensive policies like these are having positive results.

    In Australia, the food industry has made voluntary commitments to reduce some unhealthy food ads directly targeting children. But these promises are widely viewed as ineffective.

    The government is currently conducting a feasibility study on additional options to limit unhealthy food marketing to children.

    But the effectiveness of any new policies will depend on how comprehensive they are. Food companies are likely to rapidly shift their marketing techniques to maximise their impact. If any new government restrictions do not include all marketing channels (such as TV, online and on packaging) and techniques (including both product and brand marketing), they’re likely to fail to adequately protect children.

    Food labelling

    Food regulatory authorities are currently considering a range of improvements to food labelling in Australia.

    For example, food ministers in Australia and New Zealand are soon set to consider mandating the health star rating front-of-pack labelling scheme.

    Public health groups have consistently recommended mandatory implementation of health star ratings as a priority for improving Australian diets. Such changes are likely to result in meaningful improvements to the healthiness of what we eat.

    Regulators are also reviewing potential changes to how added sugar is labelled on product packages. The recommendation from the committee to include added sugar labelling on the front of product packaging is likely to support this ongoing work.

    But changes to food labelling laws are notoriously slow in Australia. And food companies are known to oppose and delay any policy changes that might hurt their profits.

    A woman holding a young boy while looking at products on a supermarket shelf.
    Health star ratings are not compulsory in Australia. BLACKDAY/Shutterstock

    A sugary drinks tax

    Of the report’s 23 recommendations, the sugary drinks levy was the only one that wasn’t universally supported by the committee. The four Liberal and National party members of the committee opposed implementation of this policy.

    As part of their rationale, the dissenting members cited submissions from food industry groups that argued against the measure. This follows a long history of the Liberal party siding with the sugary drinks industry to oppose a levy on their products.

    The dissenting members didn’t acknowledge the strong evidence that a sugary drinks levy has worked as intended in a wide range of countries.

    In the UK, for example, a levy on sugary drinks implemented in 2018 has successfully lowered the sugar content in UK soft drinks and reduced sugar consumption.

    The dissenting committee members argued a sugary drinks levy would hurt families on lower incomes. But previous Australian modelling has shown the two most disadvantaged quintiles would reap the greatest health benefits from such a levy, and accrue the highest savings in health-care costs.

    What happens now?

    Improvements to population diets and prevention of obesity will require a comprehensive and coordinated package of policy reforms.

    Globally, a range of countries facing rising epidemics of obesity and diabetes are starting to take such strong preventive action.

    In Australia, after years of inaction, this week’s report is the latest sign that long-awaited policy change may be near.

    But meaningful and effective policy change will require politicians to listen to the public health evidence rather than the protestations of food companies concerned about their bottom line.

    Gary Sacks, Professor of Public Health Policy, Deakin University

    This article is republished from The Conversation under a Creative Commons license. Read the original article.

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  • Are Waist Trainers Just A Waste, And Are Posture Fixers A Quick Fix?

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    Are Waist Trainers Just A Waste, And Are Posture Fixers A Quick Fix?

    Yesterday, we asked you for your opinions on waist trainers and posture-fixing harnesses, and got the above-depicted, below-described set of results:

    • The most popular response was “Waist trainers are purely cosmetic, so useless. Posture-fixers have merit”, with a little over a quarter of the votes.
    • The least popular response was “Both are great tools to help us to optimal waist size and posture, respectively!
    • The other three answers each got a little under a quarter of the vote. In terms of discrete data, these were all 7±1, so basically, there was nothing in it.

    The sample size was smaller than usual—perhaps the cluster of American holiday dates yesterday and today kept people busy! But, pressing on…

    What does the science say?

    Waist trainers are purely cosmetic, so, useless. True or False?

    True, simply. Honestly, they’re not even that great for cosmetic purposes. They will indeed cinch in your middle, and this shape will be retained for a (very) short while after uncinching, because your organs have been squished inwards and may take a short while to get back to where they are supposed to be.

    The American Board of Cosmetic Surgery may not be an unbiased source, but we’re struggling to find scientists who will even touch one of these, so, let’s see what these doctors have to say:

    • Waist training can damage vital organs
    • You will be slowly suffocating yourself
    • Waist training simply doesn’t work
    • You cannot drastically change your body shape with a piece of fabric*

    Read: ABCS | 4 Reasons to Throw Your Waist Trainer in the Trash

    *”But what about foot-binding?”—feet have many bones, whose growth can be physically restricted. Your waist has:

    • organs: necessary! (long-term damage possible, but they’re not going away)
    • muscles: slightly restrictable! (temporary restriction; no permanent change)
    • fat: very squeezable! (temporary muffin; no permanent change)

    Posture correctors have merit: True or False?

    True—probably, and as a stepping-stone measure only.

    The Ergonomics Health Association (a workplace health & safety organization) says:

    ❝Looking at the clinical evidence of posture correctors, we can say without a doubt that they do work, just not for everyone and not in the same way for all patients.❞

    Source: Do Posture Correctors Work? Here’s What Our Experts Think

    That’s not very compelling, so we looked for studies, and found… Not much, actually. However, what we did find supported the idea that “they probably do help, but we seriously need better studies with less bias”:

    The use of posture-correcting shirts for managing musculoskeletal pain is not supported by current evidence

    That is also not a compelling title, but here is where it pays to look at the studies and not just the titles. Basically, they found that the results were favorable to the posture-correctors—the science itself was just trash:

    ❝ The overall findings were that posture-correcting shirts change posture and subjectively have a positive effect on discomfort, energy levels and productivity.

    The quality of the included literature was poor to fair with only one study being of good quality. The risk of bias was serious or critical for the included studies. Overall, this resulted in very low confidence in available evidence.❞

    ~ Palsson et al.

    Since the benefit of posture correctors like this one is due to reminding the wearer to keep good posture, there is a lot more (good quality!) science for wearable biofeedback tech devices, such as this one:

    Spine Cop: Posture Correction Monitor and Assistant

    Take care!

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  • Which Magnesium? (And: When?)

    10almonds is reader-supported. We may, at no cost to you, receive a portion of sales if you purchase a product through a link in this article.

    It’s Q&A Day at 10almonds!

    Have a question or a request? We love to hear from you!

    In cases where we’ve already covered something, we might link to what we wrote before, but will always be happy to revisit any of our topics again in the future too—there’s always more to say!

    As ever: if the question/request can be answered briefly, we’ll do it here in our Q&A Thursday edition. If not, we’ll make a main feature of it shortly afterwards!

    So, no question/request too big or small

    ❝Good morning! I have been waiting for this day to ask: the magnesium in my calcium supplement is neither of the two versions you mentioned in a recent email newsletter. Is this a good type of magnesium and is it efficiently bioavailable in this composition? I also take magnesium that says it is elemental (oxide, gluconate, and lactate). Are these absorbable and useful in these sources? I am not interested in taking things if they aren’t helping me or making me healthier. Thank you for your wonderful, informative newsletter. It’s so nice to get non-biased information❞

    Thank you for the kind words! We certainly do our best.

    For reference: the attached image showed a supplement containing “Magnesium (as Magnesium Oxide & AlgaeCal® l.superpositum)”

    Also for reference: the two versions we compared head-to-head were these very good options:

    Magnesium Glycinate vs Magnesium Citrate – Which is Healthier?

    Let’s first borrow from the above, where we mentioned: magnesium oxide is probably the most widely-sold magnesium supplement because it’s cheapest to make. It also has woeful bioavailability, to the point that there seems to be negligible benefit to taking it. So we don’t recommend that.

    As for magnesium gluconate and magnesium lactate:

    • Magnesium lactate has very good bioavailability and in cases where people have problems with other types (e.g. gastrointestinal side effects), this will probably not trigger those.
    • Magnesium gluconate has excellent bioavailability, probably coming second only to magnesium glycinate.

    The “AlgaeCal® l.superpositum” supplement is a little opaque (and we did ntoice they didn’t specify what percentage of the magnesium is magnesium oxide, and what percentage is from the algae, meaning it could be a 99:1 ratio split, just so that they can claim it’s in there), but we can say Lithothamnion superpositum is indeed an algae and magnesium from green things is usually good.

    Except…

    It’s generally best not to take magnesium and calcium together (as that supplement contains). While they do work synergistically once absorbed, they compete for absorption first so it’s best to take them separately. Because of magnesium’s sleep-improving qualities, many people take calcium in the morning, and magnesium in the evening, for this reason.

    Some previous articles you might enjoy meanwhile:

    Take care!

    Don’t Forget…

    Did you arrive here from our newsletter? Don’t forget to return to the email to continue learning!

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