
HBD: The Human Being Diet – by Petronella Ravenshear
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We don’t often review diet books, so why did this one catch our attention? The answer lies in its comprehensive nature without being excessively long and complex.
Ravenshear (a nutritionist) brings a focus on metabolic balance, and what will and won’t work for keeping it healthy.
The first part of the book is mostly informational; covering such things as blood sugar balance, gut health, hormones, and circadian rhythm considerations, amongst others.
The second, larger part of the book is mostly instructional; do this and that, don’t do the other, guidelines on quantities and timings, and what things may be different for some people, and what to do about those.
The style is conversational and light, but well-grounded in good science.
Bottom line: if you’d like a “one-stop shop” for giving your diet an overhaul, this book is a fine choice.
Click here to check out the Human Being Diet, and enjoy the best of health!
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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”:
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.❞
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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How To Improve Your Heart Rate Variability
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How’s your heart rate variability?
The hallmarks of a good, strong cardiovascular system include a medium-to-low resting heart rate (for adults: under 60 beats per minute is good; under 50 is typical of athletes), and healthy blood pressure (for adults: under 120/80, while still above 90/60, is generally considered good).
Less talked-about is heart rate variability, but it’s important too…
What is heart rate variability?
Heart rate variability is a measure of how quickly and easily your heart responds to changes in demands placed upon it. For example:
- If you’re at rest and then start running your fastest (be it for leisure or survival or anything in between), your heart rate should be able to jump from its resting rate to about 180% of that as quickly as possible
- When you stop, your heart rate should be able to shift gears back to your resting rate as quickly as possible
The same goes, to a commensurately lesser extent, to changes in activity between low and moderate, or between moderate and high.
- When your heart can change gears quickly, that’s called a high heart rate variability
- When your heart is sluggish to get going and then takes a while to return to normal after exertion, that’s called a low heart rate variability.
The rate of change (i.e., the variability) is measured in microseconds per beat, and the actual numbers will vary depending on a lot of factors, but for everyone, higher is better than lower.
Aside from quick response to crises, why does it matter?
If heart rate variability is low, it means the sympathetic nervous system is dominating the parasympathetic nervous system, which means, in lay terms, your fight-or-flight response is overriding your ability to relax.
See for example: Stress and Heart Rate Variability: A Meta-Analysis and Review of the Literature
This has a lot of knock-on effects for both physical and mental health! Your heart and brain will take the worst of this damage, so it’s good to improve things for them impossible.
This Saturday’s Life Hacks: how to improve your HRV!
Firstly, the Usual Five Things™:
- A good diet (that avoids processed foods)
- Good exercise (that includes daily physical activity—more often is more important than more intense!)
- Good sleep (7–9 hours of good quality sleep per night)
- Reduce or eliminate alcohol consumption (this is dose-dependent; any reduction is an improvement)
- Don’t smoke (just don’t)
Additional regular habits that help a lot:
- Breathing exercises, mindfulness, meditation
- Therapy, especially CBT and DBT
- Stress-avoidance strategies, for example:
- Get (and maintain) your finances in good order
- Get (and maintain) your relationship(s) in good order
- Get (and maintain) your working* life in good order
*Whatever this means to you. If you’re perhaps retired, or otherwise a home-maker, or even a student, the things you “need to do” on a daily basis are your working life, for these purposes.
In terms of simple, quick-fix, physical tweaks to focus on if you’re already broadly leading a good life, two great ones are:
- Exercise: get moving! Walk to the store even if you buy nothing but a snack or drink to enjoy while walking back. If you drove, make more trips with the shopping bags rather than fewer. If you like to watch TV, consider an exercise bike or treadmill to use while watching. If you have a partner, double-up and make it a thing you do together! Take the stairs instead of the elevator. Take the scenic route when walking someplace. Go to the bathroom that’s further away. Every little helps!
- Breathe: even just a couple of times a day, practice mindful breathing. Start with even just a minute a day, to get the habit going. What breathing exercise you do isn’t so important as that you do it. Notice your breathing; count how long each breath takes. Don’t worry about “doing it right”—you’re doing great, just observe, just notice, just slowly count. We promise that regular practice of this will have you feeling amazing
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Overcoming Gravity – by Steven Low
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The author, a professional gymnast and coach with a background in the sciences, knows his stuff here. This is what it says on the tin: it’s rigorously systematic. It’s also the most science-based calisthenics book this reviewer has read to date.
If you just wanted to know how to do some exercises, then this book would be very much overkill, but if you want to be able to go from no knowledge to expert knowledge, then the nearly 600 pages of this weighty tome will do that for you.
This is a textbook, it’s a “the bible of…” style book, it’s the one that if you’re serious, will engage you thoroughly and enable you to craft the calisthenics-forged body you want, head to toe.
As if it weren’t already overdelivering, it also has plenty of information on injury avoidance (or injury/condition management if you have some existing injury or chronic condition), and building routines in a dynamic fashion that avoids becoming a grind, because it’s going from strength to strength while cycling through different body parts.
Bottom line: if you’d like to get serious about calisthenics, then this is the book for you.
Click here to check out Overcoming Gravity, and do just that!
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You can now order all kinds of medical tests online. Our research shows this is (mostly) a bad idea
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Elena.Katkova/Shutterstock Many of us have done countless rapid antigen tests (RATs) over the course of the pandemic. Testing ourselves at home has become second nature.
But there’s also a growing worldwide market in medical tests sold online directly to the public. These are “direct-to-consumer” tests, and you can access them without seeing a doctor.
While this might sound convenient, the benefits to most consumers are questionable, as we discovered in a recent study.
What are direct-to-consumer tests?
Let’s start with what they’re not. We’re not talking about patients who are diagnosed with a condition, and use tests to monitor themselves (for example, finger-prick testing to monitor blood sugar levels for people with diabetes).
We’re also not talking about home testing kits used for population screening, such as RATs for COVID, or the “poo tests” sent to people aged 50 and over for bowel cancer screening.
Direct-to-consumer tests are products marketed to anyone who is willing to pay, without going through their GP. They can include hormone profiling tests, tests for thyroid disease and food sensitivity tests, among many others.
Some direct-to-consumer tests allow you to complete the test at home, while self-collected lab tests give you the equipment to collect a sample, which you then send to a lab. You can now also buy pathology requests for a lab directly from a company without seeing a doctor.
We’ve all become accustomed to RATs during the pandemic.
Ground Picture/ShutterstockWhat we did in our study
We searched (via Google) for direct-to-consumer products advertised for sale online in Australia between June and December 2021. We then assessed whether each test was likely to provide benefits to those who use them based on scientific literature published about the tests, and any recommendations either for or against their use from professional medical organisations.
We identified 103 types of tests and 484 individual products ranging in price from A$12.99 to A$1,947.
We concluded only 11% of these tests were likely to benefit most consumers. These included tests for STIs, where social stigma can sometimes discourage people from testing at a clinic.
A further 31% could possibly benefit a person, if they were at higher risk. For example, if a person had symptoms of thyroid disease, a test may benefit them. But the Royal Australian College of General Practitioners does not recommend testing for thyroid disease in people without symptoms because evidence showing benefits of identifying and treating people with early thyroid disease is lacking.
Some 42% were commercial “health checks” such as hormone and nutritional status tests. Although these are legitimate tests – they may be ordered by a doctor in certain circumstances, or be used in research – they have limited usefulness for consumers.
A test of your hormone or vitamin levels at a particular time can’t do much to help you improve your health, especially because test results change depending on the time of day, month or season you test.
Most worryingly, 17% of the tests were outright “quackery” that wouldn’t be recommended by any mainstream health practitioner. For example, hair analysis for assessing food allergies is unproven and can lead to misdiagnosis and ineffective treatments.
More than half of the tests we looked at didn’t state they offered a pre- or post-test consultation.
Ordering medical tests online probably isn’t a good idea.
fizkes/ShutterstockProducts available may change outside the time frame of our study, and direct-to-consumer tests not promoted or directly purchasable online, such as those offered in pharmacies or by commercial health clinics, were not included.
But in Australia, ours is the first and only study we know of mapping the scale and variety of direct-to-consumer tests sold online.
Research from other countries has similarly found a lack of evidence to support the majority of direct-to-consumer tests.
4 questions to ask before you buy a test online
Many direct-to-consumer tests offer limited benefits, and could even lead to harms. Here are four questions you should ask yourself if you’re considering buying a medical test online.
1. If I do this test, could I end up with extra medical appointments or treatments I don’t need?
Doing a test yourself might seem harmless (it’s just information, after all), but unnecessary tests often find issues that would never have caused you problems.
For example, someone taking a diabetes test may find moderately high blood sugar levels see them labelled as “pre-diabetic”. However, this diagnosis has been controversial, regarded by many as making patients out of healthy people, a large number of whom won’t go on to develop diabetes.
2. Would my GP recommend this test?
If you have worrying symptoms or risk factors, your GP can recommend the best tests for you. Tests your GP orders are more likely to be covered by Medicare, so will cost you a lot less than a direct-to-consumer test.
3. Is this a good quality test?
A good quality home self-testing kit should indicate high sensitivity (the proportion of true cases that will be accurately detected) and high specificity (the proportion of people who don’t have the disease who will be accurately ruled out). These figures should ideally be in the high 90s, and clearly printed on the product packaging.
For tests analysed in a lab, check if the lab is accredited by the National Association of Testing Authorities. Avoid tests sent to overseas labs, where Australian regulators can’t control the quality, or the protection of your sample or personal health information.
4. Do I really need this test?
There are lots of reasons to want information from a test, like peace of mind, or just curiosity. But unless you have clear symptoms and risk factors, you’re probably testing yourself unnecessarily and wasting your money.
Direct-to-consumer tests might seem like a good idea, but in most cases, you’d be better off letting sleeping dogs lie if you feel well, or going to your GP if you have concerns.
Patti Shih, Senior Lecturer, Australian Centre for Health Engagement, Evidence and Values, University of Wollongong; Fiona Stanaway, Associate Professor in Clinical Epidemiology, University of Sydney; Katy Bell, Associate Professor in Clinical Epidemiology, Sydney School of Public Health, University of Sydney, and Stacy Carter, Professor and Director, Australian Centre for Health Engagement, Evidence and Values, University of Wollongong
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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Eat Dirt – by Dr. Josh Axe
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Dr. Axe describes leaky gut as “a serious disease with a silly name”, and hopes for people to take increased intestinal permeability (as it is otherwise known) seriously, because it can be found at the root of very many diseases, especially inflammatory / autoimmune diseases, which obviously also has significant implications for dementia (of which neuroinflammation is a fair part of the pathogenesis) and cancer (which has been described as largely a matter of immune dysfunction).
He starts strong, albeit anecdotally, with the story of his own mother’s battle with cancer and other diseases, and how her health did a U-turn (for the better) upon taking care of her gut as per the methods described in this book. Dr. Axe doesn’t go so far as to claim the gut-healthy protocol cured her cancer, but makes the (very reasonable) argument that it was a major contributory factor, especially as it was the main input variable that changed.
The book describes the various things that can go wrong with our gut and why, and for each of them presents a solution.
Some of it is as you might guess from the title—live a little dirtier, because the ubiquity of antimicrobials is leaving our immune system slack and maladjusted, causing it to varyingly a) turn on us b) not rise to the occasion when an actual pathogen arrives c) often both. Other matters of consideration include normal gut health nutrition (prebiotics and probiotics, skipping inflammatory foods), matters of medication (especially those that harm the gut), nutraceuticals such as Boswellia serrata, and even stress management.
He provides a program so that the reader can follow along step-by-step, and even a chapter of recipes, but the greatest value in the book is the explanation of gut pathology—because understanding that is foundational to recognizing a lot of things (and he does provide diagnostic questionnaires also, which are helpful).
Bottom line: if you’d like to improve almost any aspect of your health, then your gut is almost always an excellent place to start, and this book will set you on the right path.
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What Size Breakfast Is Best, By Science?
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“Breakfast is the most important meal of the day”, the popular wisdom goes. But, what should it consist of, and how much should we be eating for breakfast?
It has been previously established that it is good if breakfast is the largest meal of the day:
…with meals getting progressively smaller thereafter.
Of course, very many people do the inverse: small (or skipped) breakfast, moderate lunch, larger dinner. This, however, is probably more a result of when eating fits around the modern industrialized workday (and thus gets normalized), rather than actual health considerations.
So, what’s the latest science?
A plucky band of researchers led by Dr. Karla-Alejandra Pérez-Vega investigated the importance of breakfast in the context of heart health. This research was done as part of a larger study into the effects of the Mediterranean Diet on cardiovascular health, so if anyone wants a quick recap before we carry on, then:
The Mediterranean Diet: What Is It Good For? ← the answer, by the way, is “pretty much everything”
…and there are also different versions that each use the Mediterranean Diet as the core, while focussing extra on a different area of health, including one to make it extra heart-healthy:
Four Ways To Upgrade The Mediterranean ← most anti-inflammatory / gut-healthiest / heart-healthiest / brain-healthiest
What they found
In their sample population (n=383) of Spanish adults aged 55–75 with pre-diagnosed metabolic syndrome who, as part of the intervention of this 36-month interventional study, had now for the past 36 months been on a Mediterranean diet but without specific guidance on portion sizes:
- Participants with insufficient breakfast energy intake had the highest adiposity (which is a measure of body fat expressed as a percentage of total mass)
- Participants with low or high (but not moderate) breakfast energy intake had the larger BMI and waist circumference over time
- Participants with low or high (but not moderate) breakfast energy intake had higher triglyceride and lower HDL (good) cholesterol levels
- Participants who consumed 20–30% of their daily calories at breakfast enjoyed the greatest improvements in lipid profiles, with lower triglycerides and higher HDL (good) cholesterol levels
- Participants with lower breakfast quality (lower adherence to Mediterranean Diet) had higher blood pressure levels
- Participants with lower breakfast quality (lower adherence to Mediterranean Diet) had higher blood sugar levels
- Participants with lower breakfast quality (lower adherence to Mediterranean Diet) had lower estimated glomerular filtration rate (which is an indicator of kidney function)
- Participants with higher breakfast quality (higher adherence to Mediterranean Diet) had lower waist circumference, higher HDL cholesterol, and better kidney function
You can see the paper itself here in the Journal of Nutrition, Health, and Aging:
What this means
According to this research, the heart-healthiest breakfast is:
- not skipped
- Mediterranean Diet adherent
- within the range of of 20–30% of the total calories for the day
Want to make it even better?
Consider:
Before You Eat Breakfast: 3 Surprising Facts About Intermittent Fasting
Enjoy!
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