Endure – by Alex Hutchinson
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Life is a marathon, not a sprint. For most of us, at least. But how do we pace ourselves to go the distance, without falling into complacency along the way?
According to our author Alex Hutchinson, there’s a lot more to it than goal-setting and strategy.
Hutchinson set out to write a running manual, and ended up writing a manual for life. To be clear, this is still mostly centered around the science of athletic endurance, but covers the psychological factors as much as the physical… and notes how the capacity to endure is the key trait that underlies great performance in every field.
The writing style is both personal and personable, and parts read like a memoir (Hutchinson himself being a runner and sports journalist), while others are scientific in nature.
As for the science, the kind of science examined runs the gamut from case studies to clinical studies. We examine not just the science of physical endurance, but the science of psychological endurance too. We learn about such things as:
- How perception of ease/difficulty plays its part
- What factors make a difference to pain tolerance
- How mental exhaustion affects physical performance
- What environmental factors increase or lessen our endurance
- …and many other elements that most people don’t consider
Bottom line: whether you want to run a marathon in under two hours, or just not quit after one minute forty seconds on the exercise bike, or to get through a full day’s activities while managing chronic pain, this book can help.
Click here to check out Endure, and find out what you are capable of when you move your limits!
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Vaccines and cancer: The myth that won’t die
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Two recent studies reported rising cancer rates among younger adults in the U.S. and worldwide. This prompted some online anti-vaccine accounts to link the studies’ findings to COVID-19 vaccines.
But, as with other myths, the data tells a very different story.
What you need to know
- Baseless claims that COVID-19 vaccines cause cancer have persisted online for several years and gained traction in late 2023.
- Two recent reports finding rising cancer rates among younger adults are based on pre-pandemic cancer incidence data. Cancer rates in the U.S. have been on the rise since the 1990s.
- There is no evidence of a link between COVID-19 vaccination and increased cancer risk.
False claims about COVID-19 vaccines began circulating months before the vaccines were available. Chief among these claims was misinformed speculation that vaccine mRNA could alter or integrate into vaccine recipients’ DNA.
It does not. But that didn’t prevent some on social media from spinning that claim into a persistent myth alleging that mRNA vaccines can cause or accelerate cancer growth. Anti-vaccine groups even coined the term “turbo cancer” to describe a fake phenomenon of abnormally aggressive cancers allegedly linked to COVID-19 vaccines.
They used the American Cancer Society’s 2024 cancer projection—based on incidence data through 2020—and a study of global cancer trends between 1999 and 2019 to bolster the false claims. This exposed the dishonesty at the heart of the anti-vaccine messaging, as data that predated the pandemic by decades was carelessly linked to COVID-19 vaccines in viral social media posts.
Some on social media cherry-pick data and use unfounded evidence because the claims that COVID-19 vaccines cause cancer are not true. According to the National Cancer Institute and American Cancer Society, there is no evidence of any link between COVID-19 vaccines and an increase in cancer diagnosis, progression, or remission.
Why does the vaccine cancer myth endure?
At the root of false cancer claims about COVID-19 vaccines is a long history of anti-vaccine figures falsely linking vaccines to cancer. Polio and HPV vaccines have both been the target of disproven cancer myths.
Not only do HPV vaccines not cause cancer, they are one of only two vaccines that prevent cancer.
In the case of polio vaccines, some early batches were contaminated with simian virus 40 (SV40), a virus that is known to cause cancer in some mammals but not humans. The contaminated batches were discovered, and no other vaccine has had SV40 contamination in over 60 years.
Follow-up studies found no increase in cancer rates in people who received the SV40-contaminated polio vaccine. Yet, vaccine opponents have for decades claimed that polio vaccines cause cancer.
Recycling of the SV40 myth
The SV40 myth resurfaced in 2023 when vaccine opponents claimed that COVID-19 vaccines contain the virus. In reality, a small, nonfunctional piece of the SV40 virus is used in the production of some COVID-19 vaccines. This DNA fragment, called the promoter, is commonly used in biomedical research and vaccine development and doesn’t remain in the finished product.
Crucially, the SV40 promoter used to produce COVID-19 vaccines doesn’t contain the part of the virus that enters the cell nucleus and is associated with cancer-causing properties in some animals. The promoter also lacks the ability to survive on its own inside the cell or interact with DNA. In other words, it poses no risk to humans.
Over 5.6 billion people worldwide have received COVID-19 vaccines since December 2020. At that scale, even the tiniest increase in cancer rates in vaccinated populations would equal hundreds of thousands of excess cancer diagnoses and deaths. The evidence for alleged vaccine-linked cancer would be observed in real incidence, treatment, and mortality data, not social media anecdotes or unverifiable reports.
This article first appeared on Public Good News and is republished here under a Creative Commons license.
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The Vagus Nerve’s Power for Weight Loss
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Dr. Arun Dhir is a university lecturer, a gastrointestinal surgeon, an author, and a yoga and meditation instructor, and he has this to say:
Gut feelings
The vagus nerve is the 10th cranial nerve, also known as “vagus” (“the wanderer”), because it travels from the brain to many other body parts, including the ears, throat, heart, respiratory system, gut, pancreas, liver, and reproductive system. It’s no surprise then, that it plays a key role in brain-gut communication and metabolism regulation.
The vagus nerve is part of the parasympathetic nervous system, responsible for rest, digestion, and counteracting the stress response. Most signals through the vagus nerve travel from the gut to the brain, though there is communication in both directions.
You may be beginning to see how this works and its implications for weight management: the vagus nerve senses metabolites from the liver, pancreas, and small intestine, and regulates insulin production by stimulating beta cells in the pancreas, which is important for avoiding/managing insulin resistance and metabolic syndrome in general.
Dr. Dhir cites a study in which vagus nerve stimulation (originally used for treating epilepsy and depression) was shown to cause unintentional weight loss (6-11%) in patients, revealing a link to weight management. Of course, that is quite a specific sample, so more research is needed to say for sure, but because the principle is very sound and the mechanism of action is clear, it’s not being viewed as a controversial conclusion.
As for how get these benefits, here are seven ways:
- Cold water on the face: submerge your face in cold water in the morning while holding water in your mouth, or cover your face with a cold wet washcloth (while holding your breath please; no need to waterboard yourself!), which activates the “mammalian dive response” in which your body activates the parasympathetic nervous system in order to remain calm and thus survive for longer underwater
- Alternate hot and cold showers: switch between hot and cold water during showers for 10-second intervals; this creates eustress and activates the process of hormesis, improving your overall stress management and reducing any chronic stress response you may otherwise have going on
- Humming and gargling: the vibrations in the throat stimulate the nearby vagus nerve
- Deep breathing (pranayama): yoga breathing exercises, especially combined with somatic exercises such as the sun salutation, can stimulate the vagus nerve
- Intermittent fasting: helps recalibrate the metabolism and indirectly improves vagus nerve function
- Massage and acupressure: stimulates lymphatic channels and the vagus nerve
- Long walks in nature (“forest bathing”): helps trigger relaxation in general
For more on all of this, enjoy:
Click Here If The Embedded Video Doesn’t Load Automatically!
Want to learn more?
You might also like to read:
The Vagus Nerve (And How You Can Make Use Of It)
Take care!
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Milk Thistle For The Brain, Bones, & More
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“Thistle Do Nicely”
Milk thistle is a popular supplement; it comes from the milk thistle plant (Silybum marianum), commonly just called thistles. There are other kinds of thistle too, but these are one of the most common.
So, what does it do?
Liver health
Milk thistle enjoys popular use to support liver health; the liver is a remarkably self-regenerative organ if given the chance, but sometimes it can use a helping hand.
See for example: How To Undo Liver Damage
As for milk thistle’s beneficence, it is very well established:
- Milk thistle in liver diseases: past, present, future
- Hepatoprotective effect of silymarin
- Silybum Marianum and Chronic Liver Disease: A Marriage of Many Years
Brain health
For this one the science is less well-established, as studies so far have been on non-human animals, or have been in vitro studies.
Nevertheless, the results so far are promising, and the mechanism of action seems to be a combination of reducing oxidative stress and neuroinflammation, as well as suppressing amyloid β-protein (Aβ) fibril formation, in other words, reducing amyloid plaques.
General overview: A Mini Review on the Chemistry and Neuroprotective Effects of Silymarin
All about the plaques, but these are non-human animal studies:
- Mouse model: Silymarin attenuated the amyloid β plaque burden and improved behavioral abnormalities in an Alzheimer’s disease mouse model
- Rat model: Silymarin effect on amyloid-β plaque accumulation and gene expression of APP in an Alzheimer’s disease rat model
Against diabetes
Milk thistle improves insulin sensitivity, and reduces fasting blood sugar levels and HbA1c levels. The research so far is mostly in type 2 diabetes, however (at least, so far as we could find). For example:
Studies we could find for T1D were very far from translatable to human usefulness, for example, “we poisoned these rats with streptozotocin then gave them megadoses of silymarin (10–15 times the dose usually recommended for humans) and found very small benefits to the lenses of their eyes” (source).
Against osteoporosis
In this case, milk thistle’s estrogenic effects may be of merit to those at risk of menopause-induced osteoporosis:
If you’d like a quick primer about such things as what antiosteoclastic activity is, here’s a quick recap:
Which Osteoporosis Medication, If Any, Is Right For You?
Is it safe?
It is “Generally Recognized As Safe”, and even when taken at high doses for long periods, side effects are very rare.
Contraindications include if you’re pregnant, nursing, or allergic.
Potential reasons for caution (but not necessarily contraindication) include if you’re diabetic (its blood-sugar lowering effects will decrease the risk of hyperglycemia while increasing the risk of hypoglycemia), or have a condition that could be exacerbated by its estrogenic effects—including if you are on HRT, because it’s an estrogen receptor agonist in some ways (for example those bone benefits we mentioned before) but an estrogen antagonist in others (for example, in the uterus, if you have one, or in nearby flat muscles, if you don’t).
As ever, speak with your doctor/pharmacist to be sure.
Want to try it?
We don’t sell it, but here for your convenience is an example product on Amazon
Enjoy!
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Avoiding Anemia (More Than Just “Get More Iron”)
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The Iron Dilemma: Factors To Consider
Anemia affects around 10% of American seniors, and that number jumps to 34–39% if there’s a comorbidity such as diabetes, hypertension, or hypercholesterolemia, which in turn climbs with increasing age or with other chronic conditions:
So, what can we do about it?
Get iron yes, but how?
We’d be remiss not to say: yes, do of course make sure you get plenty of iron.
Most people know that red meats, which are terrible for the heart and for cancer risk, are good sources of iron.
Well, good insofar as they provide plenty of it! They’re bad for other reasons.
❝Studies consistently show that consumption of red meat has been contributory to a multitude of chronic conditions such as diabetes, CVD, and malignancies.
There are various emerging reasons that strengthen this link-from the basic constituents of red meat like the heme iron component, the metabolic reactions that take place after consumption, and finally to the methods used to cook it.
The causative links show that even occasional use raises the risk of T2DM.❞
Source: Red Meat Consumption (Heme Iron Intake) and Risk for Diabetes and Comorbidities?
To heme or not to heme
Did you catch that in the middle there, about the heme iron component?
Dietary iron is broadly divided into two kinds: heme, and non-heme.
- Heme iron comes from animals
- Non-heme iron comes from plants
Bad news for vegans: non-heme iron is not so easily absorbed as heme iron.
This means that if you’re just eating plants, the RDA may be significantly lowballing the amount actually required. As a rule, about 1.8x more iron may be needed for vegans, to compensate for it being less easily absorbed.
Why this happens: it’s because of the phytic acid / phytate in the plants that contain the iron, blocking its absorption.
Good news for vegans: however, taking iron with vitamin C increases its absorption rate by about 5x better absorption, and several other side-along nutrients do similarly, including allium (from garlic), carotenoids (from many colorful plants), and fermented foods.
Why this happens: it’s because they bind with similar sites as phytic acid, without causing the same effect. To make a metaphor: these foods steal phytic acid’s parking space, so phytic acid can’t do its iron-blocking thing.
By happy coincidence, today’s featured recipe has all of these things in, by the way (vitamin C, allium, carotenoids, and fermented foods), and the star ingredient (fava beans) is a rich source of iron.
What are good sources of iron, then?
In the category of plants:
- Beans (pick your favorites / eat a variety)
- Lentils (pick your favorites / eat a variety)
- Greens (especially dark leafy greens)
- Apricots (you can get these dried, for convenience!)
- Dark chocolate (5mg per 1oz square!)*
*Ok, technically dark chocolate is not a plant; cacao is a plant; dark chocolate is usually plant-based, though, as there is no reason to add milk.
In the category of dairy products:
That’s not a publication error; dairy products are just not great for iron. Cheeses are more nutrient-dense than milk, and have less than 0.5mg per oz, in other words, the top dairy product has around 10x less iron than dark chocolate, which came in 5th place and let’s face it, we were doing broad categories there. If we listed all the beans, lentils, greens, etc it’d be a much longer list.
Eggs, which are sometimes considered under the category of dairy by virtue of not being an animal (yet!) but an animal product, have around 1mg per egg, by the way, so considering eggs are nearer 2oz, that’s not much better than the cheese.
“But what about if…”
The above is good science and general good advice for most people. That said, some people may have conditions that preclude the foods we recommended, or have other considerations, and so things may be different. Anemia can sometimes be caused by things that can’t be fixed by diet (beyond the scope of today’s article; another time, perhaps), but for example, if you have leukemia then definitely discuss things with your doctors first. Other illnesses, and some medications, can also have troublesome effects that can contribute to anemia. Again, we can offer very good general information here, but we don’t know your medical history, and our standard legal/medical disclaimer applies as always.
See also: Do We Need Animal Products To Be Healthy?
Take care!
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Fitness In Our Fifties
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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
Q: What’s a worthwhile fitness goal for people in their 50s?
A: At 10almonds, we think that goals are great but habits are better.
If your goal is to run a marathon, that’s a fine goal, and can be very motivating, but then after the marathon, then what? You’ll look back on it as a great achievement, but what will it do for your future health?
PS, yes, marathon-running in one’s middle age is a fine and good activity for most people. Maybe skip it if you have osteoporosis or some other relevant problem (check with your doctor), but…
Marathons in Mid- and Later-Life ← we wrote about the science of it here
PS, we also explored some science that may be applicable to your other question, on the same page as that about marathons!
The thing about habits vs goals is that habits give ongoing cumulative (often even: compounding) benefits:
How To Really Pick Up (And Keep!) Those Habits
If you pressingly want advice on goals though, our advice is this:
Make it your goal to be prepared for the health challenges of later life. It may seem gloomy to say that old age is coming for us all if something else doesn’t get us first, but the fact is, old age does not have to come with age-related decline, and the very least, we can increase our healthspan (so we’re hitting 90 with most of the good health we enjoyed in our 70s, for example, or hitting 80 with most of the good health we enjoyed in our 60s).
If that goal seems a little wishy-washy, here are some very specific and practical ideas to get you started:
Train For The Event Of Your Life!
As for the limits and/or extents of how much we can do in that regard? Here are what two aging experts have to say:
And here’s what we at 10almonds had to say:
Age & Aging: What Can (And Can’t) We Do About It?
Take care!
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Body by Science – by Dr. Doug McGuff & John Little
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The idea that you’ll get a re-sculpted body at 12 minutes per week is a bold claim, isn’t it? Medical Doctor Doug McGuff and bodybuilder John Little team up to lay out their case. So, how does it stand up to scrutiny?
First, is it “backed by rigorous research” as claimed? Yes… with caveats.
The book uses a large body of scientific literature as its foundation, and that weight of evidence does support this general approach:
- Endurance cardio isn’t very good at burning fat
- Muscle, even just having it without using it much, burns fat to maintain it
- To that end, muscle can be viewed as a fat-burning asset
- Muscle can be grown quickly with short bursts of intense exercise once per week
Why once per week? The most relevant muscle fibers take about that long to recover, so doing it more often will undercut gains.
So, what are the caveats?
The authors argue for slow reps of maximally heavy resistance work sufficient to cause failure in about 90 seconds. However, most of the studies cited for the benefits of “brief intense exercise” are for High Intensity Interval Training (HIIT). HIIT involves “sprints” of exercise. It doesn’t have to be literally running, but for example maxing out on an exercise bike for 30 seconds, slowing for 60, maxing out for 30, etc. Or in the case of resistance work, explosive (fast!) concentric movements and slow eccentric movements, to work fast- and slow-twitch muscle fibers, respectively.
What does this mean for the usefulness of the book?
- Will it sculpt your body as described in the blurb? Yes, this will indeed grow your muscles with a minimal expenditure of time
- Will it improve your body’s fat-burning metabolism? Yes, this will indeed turn your body into a fat-burning machine
- Will it improve your “complete fitness”? No, if you want to be an all-rounder athlete, you will still need HIIT, as otherwise anything taxing your under-worked fast-twitch muscle fibers will exhaust you quickly.
Bottom line: read this book if you want to build muscle efficiently, and make your body more efficient at burning fat. Best supplemented with at least some cardio, though!
Click here to check out Body by Science, and get re-sculpting yours!
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