A Cold Shower A Day Keeps The Doctor Away?
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A Cold Shower A Day Keeps The Doctor Away?
This is Dutch extreme athlete Wim Hof, also known as “The Iceman”! He’s broken many world records mostly relating to the enduring the cold, for example:
- climbing Mount Kilimanjaro in shorts
- running a half-marathon above the Arctic Circle barefoot
- standing in a container completely covered with ice cubes for more than 112 minutes
You might not want to do yoga in your pyjamas on an iceberg, but you might like…
- better circulatory health
- reduced risk of stroke
- a boosted immune system
- healthier skin
- more energy and alertness
…and things like that. Wim Hof’s method is not just about extreme athletic achievements; most of what he does, the stuff that can benefit the rest of us, is much more prosaic.
The Wim Hof Method
For Wim Hof, three things are key:
- Breathing (See: Wim Hof Method Breathing Exercises)
- Commitment (See: How to Increase Willpower)
- Cold therapy (See: Benefits of Cold Therapy)
Today, we’re going to be focusing on the last one there.
What are the benefits of Cold Therapy?
Once upon a time, we didn’t have central heating, electric blankets, thermal underwear, and hot showers. In fact, once upon a time, we didn’t have houses or clothes. We used to be a lot more used to the elements! And while it’s all well and good to enjoy modern comforts, it has left our bodies lacking practice.
Practice at what? Most notably: vasodilation and vasoconstriction, in response to temperature changes. Either:
- vasodilation, because part of our body needs more blood to keep it warm and nourished, or
- vasoconstriction, because part of our body needs less blood running through it to get cooled down.
Switching between the two gives the blood vessels practice at doing it, and improves vascular muscle tone. If your body doesn’t get that practice, your blood vessels will be sluggish at making the change. This can cause circulation problems, which in turn have a big impact in many other areas of health, including:
- cardiovascular disease
- stroke risk
- mood instability
- nerve damage in extremities
On the flipside, if the blood vessels do get regular practice at dilating and constricting, you might enjoy lower risk of those things, and instead:
- improved immune response
- healthier skin
- better quality sleep
- more energy and alertness
- improved sexual performance/responsiveness
So, how to get that, without getting extreme?
As today’s title suggests, “a cold shower a day” is a great practice.
You don’t have to jump straight in, especially if you think your circulation and vascular responses might be a bit sluggish in the first instance. In fact, Wim Hof recommends:
- Week 1: Thirty seconds of cold water at the end of a warm shower each morning
- Week 2: One minute of cold water at the end of a warm shower each morning
- Week 3: A minute and a half of cold water at the end of a warm shower each morning
- Week 4: Two minutes of cold water at the end of a warm shower each morning
How cold is cold?
The benefits of cold exposure begin at around 16ºC / 60ºF, so in most places, water from the cold water mains is sufficiently cold.
As your body becomes more used to making the quick-change on a vascular level, the cold water will seem less shocking to your system. In other words, on day 30 it won’t hit you like it did on day one.
At that point, you can either continue with your two-minutes daily cold shower, and reap the benefits, or if you’re curious to push it further, that’s where ice baths come in!
Can anyone do it, or are any conditions contraindicated?
As ever, we’re a health and productivity newsletter, not doctors, let alone your doctors. Nothing here is medical advice. However, Wim Hof himself says:
❝Listen to your body, and never force the practices. We advise against doing Wim Hof Method if you are dealing with any of the following:
- Epilepsy
- High blood pressure
- Coronary heart disease
- A history of serious healthy issues like heart failure or stroke
- Pregnancy*
- Childhood*❞
*There is simply not enough science regarding the effects of cold exposure on people who are pregnant, or children. Obviously, we don’t expect this to be remedied anytime soon, because the study insitutions’ ethics boards would (rightly!) hold up the study.
As for the other conditions, and just generally if unsure, consult a doctor.
As you can see, this does mean that a limitation of Cold Therapy is that it appears to be far better as a preventative, since it helps guard against the very conditions that could otherwise become contraindications.
We haven’t peppered today’s main feature with study papers, partly because Wim Hof’s own website has kindly collated a collection of them (with links and summaries!) onto one page:
Further reading: The Science Behind The Wim Hof Method
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Unlock Your Menopause Type – by Dr. Heather Hirsch
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We featured Dr. Hirsch before, here, and mentioned this book which, at the time, we had not yet reviewed. So, here it is:
What sets this apart from a lot of menopause books is that there’s a lot less “eat these foods and your body will magically stop exhibiting symptoms of menopause” and a lot more clinical observations and then evidence-based recommendations.
Which is not to say don’t eat broccoli and almonds; by all means, they’re great foods and contain valuable nutrients that will help. But it is to say that if your doctor’s prescription is just broccoli and almonds, maybe have those as a snack while you’re looking for a second opinion.
Dr. Hirsch goes through various “menopause types”, but it’s not so much “astrology for gynecologists” and more “here are clusters of menopause symptoms set against timeline of presentation, and they can be categorized into six main ways that between them, cover pretty much all my patients, which have been many”.
So if you, dear reader, are menopausal (including peri- or post-), then the chances are very good that you will see yourself in one of those six sets.
She then goes about how to prioritize relief and safety, and personalize a treatment plan, and maintain the best menopausal care for you, going forward.
The style is easy-reading pop-science, punctuated by clinical science and 35 pages of references. She’s also, unlike a lot of authors in the genre, manifestly not invested in being a celebrity or making a personality cult out of her recommendations; she’s happy to stick to the science and put out good advice.
Bottom line: if you or someone you love is menopausal (including peri- or post-), this is a top-tier book.
Click here to check out Unlock Your Menopause Type, and get the best care for you!
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Wholewheat Bread vs Seeded White – Which is Healthier?
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Our Verdict
When comparing wholewheat bread to seeded bread, we picked the wholewheat.
Why?
First, we will acknowledge that this is a false dichotomy; it is possible to have seeded wholewheat bread. However, it is very common to have wholewheat bread that isn’t seeded, and white bread that is seeded. So, it’s important to be able to decide which is the healthier option, since very often, this false dichotomy is what’s on offer.
We will also advise checking labels (or the baker, if getting from a bakery) to ensure that visibly brown bread is actually wholewheat, and not just dyed brown with caramel coloring or such (yes, that is a thing that some companies do).
Now, as for why we chose the wholewheat over the seeded white…
In terms of macronutrients, wholewheat bread has (on average; individual breads may vary of course) has 2x the protein and a lot more fiber.
Those seeds in seeded bread? They just aren’t enough to make a big impact on the overall nutritional value of the bread in those regards. Per slice, you are getting, what, 10 seeds maybe? This is not a meaningful dietary source of much.
Seeded bread does have proportionally more healthy fats, but the doses are still so low as to make it not worth the while; it just looks like a lot of expressed as a percentage of comparison, because of the wholewheat bread has trace amounts, and the seeded bread has several times those trace amounts, it’s still a tiny amount. So, we’d recommend looking to other sources for those healthy fats.
Maybe dip your bread, of whatever kind, into extra virgin olive oil, for example.
Wholewheat bread of course also has a lower glycemic index. Those seeds in seeded white bread don’t really slow it down at all, because they’re not digested until later.
Want to learn more?
You might like to read:
- Carb-Strong or Carb-Wrong?
- Level-Up Your Fiber Intake! (Without Difficulty Or Discomfort)
- Gluten: What’s The Truth?
Enjoy!
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Plant vs Animal Protein
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Plant vs Animal Protein: Head to Head
Some people will obviously have strong ideological opinions here—for vegetarians and vegans, it’s no question, and for meat-eaters, it’s easy to be reactive to that and double-down on the bacon. But, we’re a health science newsletter, so we’ll be sticking to the science.
Which is better, healthwise?
First, it depends on how you go about it. Consider these options:
- A piece of salmon
- A steak
- A hot dog
- A hot dog, but plant-based
- Textured soy protein (no additives)
- Edamame (young soy) beans
Three animal-based protein sources, three plant-based. We could render the competition simple (but very unfair) by pitting the hotdog against the edamame beans, or the plant-based hot dog against the piece of salmon. So let’s kick this off by saying:
- There are good and bad animal-based protein sources
- There are good and bad plant-based protein sources
Whatever you choose, keep that in mind while you do. Less processed is better in either case. And if you do go for red meat, less is better, period.
Picking the healthiest from each, how do the nutritional profiles look?
They look good in both cases! One factor of importance is that in either case, our bodies will reduce the proteins we consume to their constituent amino acids, and then rebuild them into the specific proteins we actually need. Our bodies will do that regardless of the source, because we are neither a salmon nor a soybean, for example.
We need 20 specific amino acids, for our bodies to make the proteins we will use in our bodies. Of these, 9 are considered “essential”, meaning we cannot synthesize them and must get them from our diet,
Animal protein sources contain all 9 of those (just like we do). Plant based sources often don’t, individually, but by eating soy for example (which does contain them all) and/or getting multiple sources of protein from different plants, the 9 can be covered quite easily with little thought, just by having a varied diet.
Meats are #1!
- They’re number 1 for nutritional density
- They’re number 1 for health risks, too
So while plant-based diet adherents may need to consume more varied things to get all the nutrients necessary, meat-eaters won’t have that problem.
Meat-eaters will instead have a different problem, of more diet-related health risks, e.g.
- Cardiovascular disease
- Metabolic disorders
- Cancers
So again, if eating (especially processed and/or red) meat, moderation is good. The Mediterranean Diet that we so often recommend, by default contains small amounts of lean animal protein.
Which is better for building muscle?
Assuming a broadly healthy balanced diet, and getting sufficient protein from your chosen source, they’re pretty equal:
- Vegan and Omnivorous High Protein Diets Support Comparable Daily Myofibrillar Protein Synthesis Rates and Skeletal Muscle Hypertrophy in Young Adults
- A mycoprotein-based high-protein vegan diet supports equivalent daily myofibrillar protein synthesis rates compared with an isonitrogenous omnivorous diet in older adults: a randomised controlled trial
(both studies showed that both dietary approaches yielded results that showed no difference in muscle synthesis between the two)
The bottom line is…
Healthwise, what’s more important than whether you get your protein from animals or plants is that you eat foods that aren’t processed, and are varied.
And if you want to do a suped-up Mediterranean Diet with less red meat, you might want to try:
A Pesco-Mediterranean Diet With Intermittent Fasting: JACC Review Topic of the Week
^This is from a review in the Journal of the American College of Cardiology, and in few words, they recommend it very highly
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Can apps and digital resources support your child with autism or ADHD?
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Neurodevelopmental conditions such as attention deficit hyperactivity disorder (ADHD) and autism affect about one in ten children. These conditions impact development, behaviour and wellbeing.
But children with these conditions and their caregivers often can’t get the support they need. Families report difficulties accessing health-care providers and experience long wait lists to receive care.
Digital tools, such as apps and websites, are often viewed as a solution to these gaps. With a single click or a download, families might be able to access information to support their child.
There are lots of digital tools available, but it’s hard to know what is and isn’t useful. Our new study evaluated freely available digital resources for child neurodevelopment and mental health to understand their quality and evidence base.
We found many resources were functional and engaging. However, resources often lacked evidence for the information provided and the claimed positive impact on children and families.
This is a common problem in the digital resource field, where the high expectations and claims of impact from digital tools to change health care have not yet been realised.
Fabio Principe/Shutterstock What type of resources?
Our study identified 3,435 separate resources, of which 112 (43 apps and 69 websites) met our criteria for review. These resources all claimed to provide information or supports for child neurodevelopment, mental health or wellbeing.
Resources had to be freely available, in English and have actionable information for children and families.
The most common focus was on autism, representing 17% of all resources. Resources suggested they provided strategies to promote speech, language and social development, and to support challenging behaviours.
Other common areas included language and communication (14%), and ADHD (10%).
Resources had various purposes, including journalling and providing advice, scheduling support, and delivering activities and strategies for parents. Resources delivered information interactively, with some apps organising content into structured modules.
Resources also provided options for alternative and assistive communication for people with language or communication challenges.
Most apps were functional and accessible
Our first question was about how engaging and accessible the information was. Resources that are hard to use aren’t used frequently, regardless of the information quality.
We evaluated aesthetics, including whether digital tools were easy to use and navigate, stylistically consistent, with clean and appealing graphics for users.
Most resources were rated as highly engaging, with strong accessibility and functionality.
Most apps and websites we evaluated were engaging. jamesteohart/Shutterstock But many lacked quality information
We ranked resources on various features from 1 (inadequate) to 5 (excellent), with a ranking of 3 considered acceptable. These ratings looked at how credible the resource was and whether there was evidence supporting it.
Despite their functionality, 37% of reviewed apps did not meet the minimum acceptable standards for information quality. This means many apps could not be recommended. Most websites fared better than apps.
There also wasn’t a lot of scientific evidence to suggest using either apps or digital resources actually helped families. Studies show long-term engagement with digital tools is rare, and downloads don’t correspond to frequent usage or benefits.
Digital tools are often viewed as a panacea to health-care gaps, but the evidence is yet to show they fill such gaps. Digital health is a fast-moving field and resources are often made available before they have been properly evaluated.
What should you look for in digital resources?
We found the highest quality resources were developed in collaboration with institutions, such as health, university or government groups.
One highly rated resource was the Raising Children’s Network and the associated app, Raising Healthy Minds. These are co-developed with a university and hospital, and by people with appropriate qualifications.
This resource provides information to support children’s overall health, development and wellbeing, with dedicated sections addressing neurodevelopmental needs and concerns.
The Raising Children Network provides resources for child health, including neurodevelopmental needs. Raising Children Network screenshot Our research shows parents can assess whether digital resources are high quality by checking they are:
- factually correct. Look for where the app or resource is getting its information. Does the author have the qualifications and training to provide the information? Are they a registered health expert who is accountable to a regulatory body (such as AHPRA, the Australian Health Practitioners Regulation Agency) for providing information that does not cause harm?
- consistent across multiple credible sources, such as health institutions.
- linked to supporting information. Look for reliable links to reputable institutions. Links to peer-reviewed scientific journals are often helpful as those articles will also usually describe the limitations of the research presented.
- up-to-date. Apps should be frequently updated. For websites, dates of update are usually found on the homepage or at the bottom of individual pages.
Check when information was last updated. fizkes/Shutterstock Beware of red flags
Some things to watch out for are:
- testimonials and anecdotes without evidence and scientific links to back the anecdotes up. If it sounds too good to be true, it probably is.
- no information provided about conflicts of interest. Organisations gain when you click on their links or take their advice (financial, reputation and brand development). Think about what they gain when you use their information to help keep a balanced perspective.
Remember, the app’s star rating doesn’t mean it will contain factual information from a reliable source or be helpful for you and your child.
The role of digital tools
Digital tools won’t usually replace a health professional, but they can support care in many different ways. They may be used to help to educate and prepare for meetings, and to collaborate with health providers.
They may also be used to collect information about daily needs. Studies show reporting on sleep in children can be notoriously difficult, for example. But tracking sleep behaviour with actigraphy, where movement and activity patterns are measured using a wearable device, can provide information to support clinical care. With the promise of artificial intelligence, there will also be new opportunities to support daily living.
Our findings reflect a broader problem for digital health, however. Much investment is often made in developing products to drive use, with spurious claims of health benefits.
What’s needed is a system that prioritises the funding, implementation and evaluation of tools to demonstrate benefits for families. Only then may we realise the potential of digital tools to benefit those who use them.
Kelsie Boulton, Senior Research Fellow in Child Neurodevelopment, Brain and Mind Centre, University of Sydney and Adam Guastella, Professor and Clinical Psychologist, Michael Crouch Chair in Child and Youth Mental Health, University of Sydney
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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Codependent No More – by Melody Beattie
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This is a book review, not a book summary, but first let’s quickly cover a common misconception, because the word “codependent” gets misused a lot in popular parlance:
- What codependence isn’t: “we depend on each other and must do everything together”
- What codependence is:“person 1 has a dependency on a substance (or perhaps a behavior, such as gambling); person 2 is trying to look after person 1, and so has developed a secondary relationship with the substance/behavior. Person 2 is now said to be codependent, because it becomes all-consuming for them too, even if they’re not using the substance/behavior directly”
Funny how often it happens that the reality is more complex than the perception, isn’t it?
Melody Beattie unravels all this for us. We get a compassionate and insightful look at how we can look after ourselves, while looking after another. Perhaps most importantly: how and where to draw a line of what we can and cannot do/change for them.
Because when we love someone, of course we want to fight their battles with them, if not for them. But if we want to be their rock of strength, we can’t get lost in it too, and of course that hurts.
Beatty takes us through these ideas and more, for example:
- How to examine our own feelings even when it’s scary
- How to practice self-love and regain self-worth, while still caring for them
- How to stop being reactionary, step back, and act with purpose
If the book has any weak point, it’s that it repeatedly recommends 12-step programs, when in reality that’s just one option. But for those who wish to take another approach, this book does not require involvement in a 12-step program, so it’s not a barrier to usefulness.
Click here to check out Codependent No More and take care of yourself, too
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Grapefruit vs Lemon – Which is Healthier?
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Our Verdict
When comparing grapefruit to lemon, we picked the lemon.
Why?
Grapefruit has its merits, but in the battle of the citrus fruits, lemons come out on top nutritionally:
In terms of macros, grapefruit has more carbs while lemons have more fiber. So, while both have a low glycemic index, lemon is still the winner by the numbers.
Looking at the vitamins, here we say grapefruit’s strengths: grapefruit has more of vitamins A, B2, B3, and choline, while lemon has more of vitamins B6 and C. So, a 4:2 win for grapefruit here.
In the category of minerals, lemons retake the lead: grapefruit has more zinc, while lemon has more calcium, copper, iron, manganese, and selenium.
One final consideration that’s not shown in the nutritional values, is that grapefruit contains high levels of furanocoumarin, which can inhibit cytochrome P-450 3A4 isoenzyme and P-glycoptrotein transporters in the intestine and liver—slowing down their drug metabolism capabilities, thus effectively increasing the bioavailability of many drugs manifold.
This may sound superficially like a good thing (improving bioavailability of things we want), but in practice it means that in the case of many drugs, if you take them with (or near in time to) grapefruit or grapefruit juice, then congratulations, you just took an overdose. This happens with a lot of meds for blood pressure, cholesterol (including statins), calcium channel-blockers, anti-depressants, benzo-family drugs, beta-blockers, and more. Oh, and Viagra, too. Which latter might sound funny, but remember, Viagra’s mechanism of action is blood pressure modulation, and that is not something you want to mess around with unduly. So, do check with your pharmacist to know if you’re on any meds that would be affected by grapefruit or grapefruit juice!
PS: the same substance is quite available in pummelos and sour oranges (but not meaningfully in sweet oranges); you can see a chart here showing the relative furanocoumarin contents of many citrus fruits, or lack thereof as the case may be, as it is for lemons and most limes)
Adding up the sections gives us a clear win for lemons, but by all means enjoy either or both; just watch out for that furanocoumarin content of grapefruit if you’re on any meds affected by such (again, do check with your pharmacist, as our list was far from exhaustive—and yes, this question is one that a pharmacist will answer more easily and accurately than a doctor will).
Want to learn more?
You might like to read:
Top 8 Fruits That Prevent & Kill Cancer ← citrus fruits in general make the list; they inhibit tumor growth and kill cancer cells; regular consumption is also associated with a lower cancer risk 🙂
Enjoy!
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