How Are You, Really? And How Old Is Your Heart?
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How Are You, Really? The Free NHS Health Test
We took this surprisingly incisive 10-minute test from the UK’s famous National Health Service—the test is part of the “Better Health” programme, a free-to-all (yes, even those from/in other countries) initiative aimed at keeping people healthy enough to have less need of medical attention.
As one person who took the test wrote:
❝I didn’t expect that a government initiative would have me talking about how I need to keep myself going to be there for the people I love, let alone that a rapid-pace multiple-choice test would elicit these responses and give personalized replies in turn, but here we are❞
It goes beyond covering the usual bases, in that it also looks at what’s most important to you, and why, and what might keep you from doing the things you want/need to do for your health, AND how those obstacles can be overcome.
Pretty impressive for a 10-minute test!
Is Your Health Above Average Already? Take the Free 10-minute NHS test now!
How old are you, in your heart?
Poetic answers notwithstanding (this writer sometimes feels so old, and yet also much younger than she is), there’s a biological answer here, too.
Again free for the use of all*, here’s a heart age calculator.
*It is suitable for you if you are aged 30–95, and do not have a known complicating cardiovascular disease.
It will ask you your (UK) postcode; just leave that field blank if you’re not in the UK; it’ll be fine.
How Old Are You, In Your Heart? Take the Free 10-minute NHS test now!
(Neither test requires logging into anything, and they do not ask for your email address. The tests are right there on the page, and they give the answers right there on the page, immediately)
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The Fascinating Truth About Aspartame, Cancer, & Neurotoxicity
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Is Aspartame’s Reputation Well-Deserved?
In Tuesday’s newsletter, we asked you for your health-related opinions on aspartame, and got the above-depicted, below-described, set of responses:
- About 47% said “It is an evil carcinogenic neurotoxin”
- 20% said “It is safe-ish, but has health risks that are worse than sugar”
- About 19% said “It is not healthy, but better than sugar”
- About 15% said “It’s a perfectly healthy replacement for sugar”
But what does the science say?
Aspartame is carcinogenic: True or False?
False, assuming consuming it in moderation. In excess, almost anything can cause cancer (oxygen is a fine example). But for all meaningful purposes, aspartame does not appear to be carcinogenic. For example,
❝The results of these studies showed no evidence that these sweeteners cause cancer or other harms in people.❞
~ NIH | National Cancer Institute
Source: Artificial Sweeteners and Cancer
Plenty of studies and reviews have also confirmed this; here are some examples:
- Evaluation of aspartame cancer epidemiology studies based on quality appraisal criteria
- Aspartame, low-calorie sweeteners and disease: Regulatory safety and epidemiological issues
- Aspartame: A review of genotoxicity data
Why then do so many people believe it causes cancer, despite all the evidence against it?
Well, there was a small study involving giving megadoses to rats, which did increase their cancer risk. So of course, the popular press took that and ran with it.
But those results have not been achieved outside of rats, and human studies great and small have all been overwhelmingly conclusive that moderate consumption of aspartame has no effect on cancer risk.
Aspartame is a neurotoxin: True or False?
False, again assuming moderate consumption. If you’re a rat being injected with a megadose, your experience may vary. But a human enjoying a diet soda, the aspartame isn’t the part that’s doing you harm, so far as we know.
For example, the European Food Safety Agency’s scientific review panel concluded:
❝there is still no substantive evidence that aspartame can induce such effects❞
~ Dr. Atkin et al (it was a pan-European team of 21 experts in the field)
Source: Report on the Meeting on Aspartame with National Experts
See also,
❝The data from the extensive investigations into the possibility of neurotoxic effects of aspartame, in general, do not support the hypothesis that aspartame in the human diet will affect nervous system function, learning or behavior.
The weight of existing evidence is that aspartame is safe at current levels of consumption as a nonnutritive sweetener.❞
and
❝The safety testing of aspartame has gone well beyond that required to evaluate the safety of a food additive.
When all the research on aspartame, including evaluations in both the premarketing and postmarketing periods, is examined as a whole, it is clear that aspartame is safe, and there are no unresolved questions regarding its safety under conditions of intended use.❞
Source: Regulatory Toxicology & Pharmacology | Aspartame: Review of Safety
Why then do many people believe it is a neurotoxin? This one can be traced back to a chain letter hoax from about 26 years ago; you can read it here, but please be aware it is an entirely debunked hoax:
Urban Legends | Aspartame Hoax
Take care!
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You Are Not Broken – by Dr. Kelly Casperson
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Many women express “I think I’m broken down there”, and it turns out simply that neither they nor their partners had the right knowledge, that’s all. The good news is: bedroom competence is an entirely learnable skill!
Dr. Casperson is a urologist, and over the years has expanded her work into all things pelvic, including the relevant use of both systemic and topical hormones (as in, hormones to increase overall blood serum levels of that hormone, like most HRT, and also, creams and lotions to increase levels of a given hormone in one particular place).
However, this is not 200 pages to say “take hormones”. Rather, she covers many areas of female sexual health and wellbeing, including yes, simply pleasure. From the physiological to the psychological, Dr. Casperson talks the reader through avoiding blame games and “getting out of your head and into your body”.
Bottom line: if you (or a loved one) are one of the many women who have doubts about being entirely correctly set up down there, then this book is definitely for you.
Click here to check out You Are Not Broken, and indeed stop “should-ing” all over your sex life!
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The Lies That Depression Tells Us
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In this short (6:42) video, psychiatrist Dr. Tracey Marks talks about 8 commonly-believed lies that depression often tells us. They are:
- “I don’t measure up”
- “No one cares about me”
- “I’m better off alone”
- “No one understands”
- “It’s all my fault”
- “I have no reason to be depressed”
- “Nothing matters”
- “I’ll never get better”
Some of these can be reinforced by people around us; it’s easy to believe that “no one understands” if for example the few people we interact with the most don’t understand, or that “I have no reason to be depressed” if people try to cheer you up by pointing out your many good fortunes.
The reality, of course, is that depression is a large, complex, and many-headed beast, with firm roots in neurobiology.
There are things we can do that may ameliorate it… But they also may not, and sometimes life is just going to suck for a while. That doesn’t mean we should give up (that, too, is depression lying to us, per “I’ll never get better”), but it does mean that we should not be so hard on ourselves for not having “walked it off” the way one might “just walk off” a broken leg.
Oh, you can’t “just walk off” a broken leg? Well then, perhaps it’s not surprising if we don’t “just think off” a broken brain, either. The brain can rebuild itself, but that’s a slow process, so buckle in:
Click Here If The Embedded Video Doesn’t Load Automatically!
Want to know more?
You might like these previous articles of ours about depression (managing it, and overcoming it):
- The Mental Health First-Aid That You’ll Hopefully Never Need
- Behavioral Activation Against Depression & Anxiety
- The Easiest Way To Take Up Journaling
- Antidepressants: Personalization Is Key!
Take care!
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Burn – by Dr. Herman Pontzer
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We all have reasons to want to focus on our metabolism. Speed it up to burn more fat; slow it down to live longer. Tweak it for more energy in the day. But what actually is it, and how does it work?
Dr. Herman Pontzer presents a very useful overview of not just what our metabolism is and how it works, but also why.
The style of the book is casual, but doesn’t skimp on the science. Whether we are getting campfire stories of Hadza hunter-gatherers, or an explanation of the use of hydrogen isotopes in metabolic research, Dr. Pontzer keeps things easy-reading.
One of the main premises of the book is that our caloric expenditure is not easy to change—if we exercise more, our bodies will cut back somewhere else. After all, the body uses energy for a lot more than just moving. With this in mind, Dr. Pontzer makes the science-based case for focusing more on diet than exercise if weight management is our goal.
In short, if you’d like your metabolism to be a lot less mysterious, this book can help render a lot of science a lot more comprehensible!
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What is PNF stretching, and will it improve my flexibility?
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Whether improving your flexibility was one of your new year’s resolutions, or you’ve been inspired watching certain tennis stars warming up at the Australian Open, maybe 2025 has you keen to focus on regular stretching.
However, a quick Google search might leave you overwhelmed by all the different stretching techniques. There’s static stretching and dynamic stretching, which can be regarded as the main types of stretching.
But there are also some other potentially lesser known types of stretching, such as PNF stretching. So if you’ve come across PNF stretching and it piques your interest, what do you need to know?
Undrey/Shutterstock What is PNF stretching?
PNF stretching stands for proprioceptive neuromuscular facilitation. It was developed in the 1940s in the United States by neurologist Herman Kabat and physical therapists Margaret Knott and Dorothy Voss.
PNF stretching was initially designed to help patients with neurological conditions that affect the movement of muscles, such as polio and multiple sclerosis.
By the 1970s, its popularity had seen PNF stretching expand beyond the clinic and into the sporting arena where it was used by athletes and fitness enthusiasts during their warm-up and to improve their flexibility.
Although the specifics have evolved over time, PNF essentially combines static stretching (where a muscle is held in a lengthened position for a short period of time) with isometric muscle contractions (where the muscle produces force without changing length).
PNF stretching is typically performed with the help of a partner.
There are 2 main types
The two most common types of PNF stretching are the “contract-relax” and “contract-relax-agonist-contract” methods.
The contract-relax method involves putting a muscle into a stretched position, followed immediately by an isometric contraction of the same muscle. When the person stops contracting, the muscle is then moved into a deeper stretch before the process is repeated.
For example, to improve your hamstring flexibility, you could lie down and get a partner to lift your leg up just to the point where you begin to feel a stretch in the back of your thigh.
Once this sensation eases, attempt to push your leg back towards the ground as your partner resists the movement. After this, your partner should now be able to lift your leg up slightly higher than before until you feel the same stretching sensation.
This technique was based on the premise that the contracted muscle would fall “electrically silent” following the isometric contraction and therefore not offer its usual level of resistance to further stretching (called “autogenic inhibition”). The contract-relax method attempts to exploit this brief window to create a deeper stretch than would otherwise be possible without the prior muscle contraction.
The contract-relax-agonist-contract method is similar. But after the isometric contraction of the stretched muscle, you perform an additional contraction of the muscle group opposing the muscle being stretched (referred to as the “agonist” muscle), before the muscle is moved into a static stretch once more.
Again, if you’re trying to improve hamstring flexibility, immediately after trying to push your leg towards the ground you would attempt to lift it back towards the ceiling (this bit without partner resistance). You would do this by contracting the muscles on the front of the thigh (the quadriceps, the agonist muscle in this case).
Likewise, after this, your partner should be able to lift your leg up slightly higher than before.
The contract-relax-agonist-contract method is said to take advantage of a phenomenon known as “reciprocal inhibition.” This is where contracting the muscle group opposite that of the muscle being stretched leads to a short period of reduced activation of the stretched muscle, allowing the muscle to stretch further than normal.
What does the evidence say?
Research has shown PNF stretching is associated with improved flexibility.
While it has been suggested that both PNF methods improve flexibility via changes in nervous system function, research suggests they may simply improve our ability to tolerate stretching.
It’s worth noting most of the research on PNF stretching and flexibility has focused on healthy populations. This makes it difficult to provide evidence-based recommendations for people with clinical conditions.
And it may not be the most effective method if you’re looking to improve your flexibility in the long term. A 2018 review found static stretching was better for improving flexibility compared to PNF stretching. But other research has found it could offer greater immediate benefits for flexibility than static stretching.
At present, similar to other types of stretching, research linking PNF stretching to injury prevention and improved athletic performance is relatively inconclusive.
PNF stretching may actually lead to small temporary deficits in performance of strength, power, and speed-based activities if performed immediately beforehand. So it’s probably best done after exercise or as a part of a standalone flexibility session.
Static stretching may be a more effective way to improve flexibility over the long-term. GaudiLab/Shutterstock How much should you do?
It appears that a single contract-relax or contract-relax-agonist-contract repetition per muscle, performed twice per week, is enough to improve flexibility.
The contraction itself doesn’t need to be hard and forceful – only about 20% of your maximal effort should suffice. The contraction should be held for at least three seconds, while the static stretching component should be maintained until the stretching sensation eases.
So PNF stretching is potentially a more time-efficient way to improve flexibility, compared to, for example, static stretching. In a recent study we found four minutes of static stretching per muscle during a single session is optimal for an immediate improvement in flexibility.
Is PNF stretching the right choice for me?
Providing you have a partner who can help you, PNF stretching could be a good option. It might also provide a faster way to become more flexible for those who are time poor.
However, if you’re about to perform any activities that require strength, power, or speed, it may be wise to limit PNF stretching to afterwards to avoid any potential deficits in performance.
Lewis Ingram, Lecturer in Physiotherapy, University of South Australia and Hunter Bennett, Lecturer in Exercise Science, University of South Australia
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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Delay Ageing – by Dr. Colin Rose
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Note: the title is spelled that way because it is British English. We generally write in US English here at 10almonds, but we’ll first quote directly from Dr. Rose as written:
❝I have written Delay Ageing because there is some very important recent University research on ageing and age related illness that deserves to be made accessible to a general audience.❞
What is this research? Well, there’s quite a lot over its 300-odd pages (exact number depends on the edition and whether we count end matter), and most of it is tweaks and refinements on things with which you’ll probably be at least brushingly familiar if you’re a regular 10almonds reader.
Dr. Rose addresses the nine hallmarks of aging, of which there are ten, ranging from such things as “telomeres get shorter” and “DNA accumulates damage”, to “stem cells become exhausted” and “cells fail to communicate properly”, and asks the question “what if we were to target all these things simultaneously?”.
Rather than going for drugs on drugs on drugs (half of them to deal with undesired side effects of the previous ones), Dr. Cole leaves no stone unturned to find lifestyle interventions that will improve each of these, even if just a little. Because, all those “little” improvements add up and even compound, and on the flipside, mean that factors of aging aren’t adding up and compounding so much or so quickly anymore.
The rather broad umbrella of “lifestyle interventions” obviously includes food under its auspices, and with it, nutraceuticals. So to give one example, if you’re taking a fisetin supplement (a natural senolytic agent), you’ll find science vindicating that here. And much more.
The style is… Less pop-science and more “textbook written for laypersons”, and you may be thinking “isn’t that the same?” and the difference is that the textbook has a lot less polish and finesse, but often more precise information.
Bottom line: if you’d like to combat aging on 10 different fronts with easily implementable lifestyle interventions, and know exactly what is doing what and how, then this is the book for you.
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Learn to Age Gracefully
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