The Cold Truth About Respiratory Infections
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The Pathogens That Came In From The Cold
Yesterday, we asked you about your climate-themed policy for avoiding respiratory infections, and got the above-depicted, below-described, set of answers:
- About 46% of respondents said “Temperature has no bearing on infection risk”
- About 31% of respondents said “It’s important to get plenty of cold, fresh air, as this kills/inactivates pathogens”
- About 22% of respondents said “It’s important to stay warm to avoid getting colds, flu, etc”
Some gave rationales, including…
For “stay warm”:
❝Childhood lessons❞
For “get cold, fresh air”:
❝I just feel that it’s healthy to get fresh air daily. Whether it kills germs, I don’t know❞
For “temperature has no bearing”:
❝If climate issue affected respiratory infections, would people in the tropics suffer more than those in colder climates? Pollutants may affect respiratory infections, but I doubt just temperature would do so.❞
So, what does the science say?
It’s important to stay warm to avoid getting colds, flu, etc: True or False?
False, simply. Cold weather does increase the infection risk, but for reasons that a hat and scarf won’t protect you from. More on this later, but for now, let’s lay to rest the idea that bodily chilling will promote infection by cold, flu, etc.
In a small-ish but statistically significant study (n=180), it was found that…
❝There was no evidence that chilling caused any acute change in symptom scores❞
Read more: Acute cooling of the feet and the onset of common cold symptoms
Note: they do mention in their conclusion that chilling the feet “causes the onset of cold symptoms in about 10% of subjects who are chilled”, but the data does not support that conclusion, and the only clear indicator is that people who are more prone to colds generally, were more prone to getting a cold after a cold water footbath.
In other words, people who were more prone to colds remained more prone to colds, just the same.
It’s important to get plenty of cold, fresh air, as this kills/inactivates pathogens: True or False?
Broadly False, though most pathogens do have an optimal operating temperature that (for obvious reasons) is around normal human body temperature.
However, given that they don’t generally have to survive outside of a host body for long to get passed on, the fact that the pathogens may be a little sluggish in the great outdoors will not change the fact that they will be delighted by the climate in your respiratory tract as soon as you get back into the warm.
With regard to the cold air not being a reliable killer/inactivator of pathogens, we call to the witness stand…
Polar Bear Dies From Bird Flu As H5N1 Spreads Across Globe
(it was found near Utqiagvik, one of the northernmost communities in Alaska)
Because pathogens like human body temperature, raising the body temperature is a way to kill/inactivate them: True or False?
True! Unfortunately, it’s also a way to kill us. Because we, too, cannot survive for long above our normal body temperature.
So, for example, bundling up warmly and cranking up the heating won’t necessarily help, because:
- if the temperature is comfortable for you, it’s comfortable for the pathogen
- if the temperature is dangerous to the pathogen, it’s dangerous to you too
This is why the fever response evolved, and/but why many people with fevers die anyway. It’s the body’s way of playing chicken with the pathogen, challenging “guess which of us can survive this for longer!”
Temperature has no bearing on infection risk: True or False?
True and/or False, circumstantially. This one’s a little complex, but let’s break it down to the essentials.
- Temperature has no direct effect, for the reasons we outlined above
- Temperature is often related to humidity, which does have an effect
- Temperature does tend to influence human behavior (more time spent in open spaces with good ventilation vs more time spent in closed quarters with poor ventilation and/or recycled air), which has an obvious effect on transmission rates
The first one we covered, and the third one is self-evident, so let’s look at the second one:
Temperature is often related to humidity, which does have an effect
When the environmental temperature is warmer, water droplets in the air will tend to be bigger, and thus drop to the ground much more quickly.
When the environmental temperature is colder, water droplets in the air will tend to be smaller, and thus stay in the air for longer (along with any pathogens those water droplets may be carrying).
Some papers on the impact of this:
- Cold temperature and low humidity are associated with increased occurrence of respiratory tract infections
- A Decrease in Temperature and Humidity Precedes Human Rhinovirus Infections in a Cold Climate
So whatever temperature you like to keep your environment, humidity is a protective factor against respiratory infections, and dry air is a risk factor.
So, for example:
- If the weather doesn’t suit having good ventilation, a humidifier is a good option
- Being in an airplane is one of the worst places to be for this, outside of a hospital
Don’t have a humidifier? Here’s an example product on Amazon, but by all means shop around.
A crock pot with hot water in and the lid off is also a very workable workaround too
Take care!
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How old’s too old to be a doctor? Why GPs and surgeons over 70 may need a health check to practise
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A growing number of complaints against older doctors has prompted the Medical Board of Australia to announce today that it’s reviewing how doctors aged 70 or older are regulated. Two new options are on the table.
The first would require doctors over 70 to undergo a detailed health assessment to determine their current and future “fitness to practise” in their particular area of medicine.
The second would require only general health checks for doctors over 70.
A third option acknowledges existing rules requiring doctors to maintain their health and competence. As part of their professional code of conduct, doctors must seek independent medical and psychological care to prevent harming themselves and their patients. So, this third option would maintain the status quo.
PeopleImages.com – Yuri A/Shutterstock Haven’t we moved on from set retirement ages?
It might be surprising that stricter oversight of older doctors’ performance is proposed now. Critics of mandatory retirement ages in other fields – for judges, for instance – have long questioned whether these rules are “still valid in a modern society”.
However, unlike judges, doctors are already required to renew their registration annually to practise. This allows the Medical Board of Australia not only to access sound data about the prevalence and activity of older practitioners, but to assess their eligibility regularly and to conduct performance assessments if and when they are needed.
What has prompted these proposals?
This latest proposal identifies several emerging concerns about older doctors. These are grounded in external research about the effect of age on doctors’ competence as well as the regulator’s internal data showing surges of complaints about older doctors in recent years.
Studies of medical competence in ageing doctors show variable results. However, the Medical Board of Australia’s consultation document emphasises studies of neurocognitive loss. It explains how physical and cognitive impairment can lead to poor record-keeping, improper prescribing, as well as disruptive behaviour.
The other issue is the number of patient complaints against older doctors. These “notifications” have surged in recent years, as have the number of disciplinary actions against older doctors.
In 2022–2023, the Medical Board of Australia took disciplinary action against older doctors about 1.7 times more often than for doctors under 70.
In 2023, notifications against doctors over 70 were 81% higher than for the under 70s. In that year, patients sent 485 notifications to the Medical Board of Australia about older doctors – up from 189 in 2015.
While older doctors make up only about 5.3% of the doctor workforce in Australia (less than 1% over 80), this only makes the high numbers of complaints more starkly disproportionate.
It’s for these reasons that the Medical Board of Australia has determined it should take further regulatory action to safeguard the health of patients.
So what distinguishes the two new proposed options?
The “fitness to practise” assessment option would entail a rigorous assessment of doctors over 70 based on their specialisation. It would be required every three years after the age of 70 and every year after 80.
Surgeons, for example, would be assessed by an independent occupational physician for dexterity, sight and the ability to give clinical instructions.
Importantly, the results of these assessments would usually be confidential between the assessor and the doctor. Only doctors who were found to pose a substantial risk to the public, which was not being managed, would be obliged to report their health condition to the Medical Board of Australia.
The second option would be a more general health check not linked to the doctor’s specific role. It would occur at the same intervals as the “fitness to practise” assessment. However, its purpose would be merely to promote good health-care decision-making among health practitioners. There would be no general obligation on a doctor to report the results to the Medical Board of Australia.
In practice, both of these proposals appear to allow doctors to manage their own general health confidentially.
Older surgeons could be independently assessed for dexterity, sight and the ability to give clinical instructions. worradirek/Shutterstock The law tends to prioritise patient safety
All state versions of the legal regime regulating doctors, known as the National Accreditation and Registration Scheme, include a “paramountcy” provision. That provision basically says patient safety is paramount and trumps all other considerations.
As with legal regimes regulating childcare, health practitioner regulation prioritises the health and safety of the person receiving the care over the rights of the licensed professional.
Complicating this further, is the fact that a longstanding principle of health practitioner regulation has been that doctors should not be “punished” for errors in practice.
All of this means that reforms of this nature can be difficult to introduce and that the balance between patient safety and professional entitlements must be handled with care.
Could these proposals amount to age discrimination?
It is premature to analyse the legal implications of these proposals. So it’s difficult to say how these proposals interact with Commonwealth age- and other anti-discrimination laws.
For instance, one complication is that the federal age discrimination statute includes an exemption to allow “qualifying bodies” such as the Medical Board of Australia to discriminate against older professionals who are “unable to carry out the inherent requirements of the profession, trade or occupation because of his or her age”.
In broader terms, a licence to practise medicine is often compared to a licence to drive or pilot an aircraft. Despite claims of discrimination, New South Wales law requires older drivers to undergo a medical assessment every year; and similar requirements affect older pilots and air traffic controllers.
Where to from here?
When changes are proposed to health practitioner regulation, there is typically much media attention followed by a consultation and behind-the-scenes negotiation process. This issue is no different.
How will doctors respond to the proposed changes? It’s too soon to say. If the proposals are implemented, it’s possible some older doctors might retire rather than undergo these mandatory health assessments. Some may argue that encouraging more older doctors to retire is precisely the point of these proposals. However, others have suggested this would only exacerbate shortages in the health-care workforce.
The proposals are open for public comment until October 4.
Christopher Rudge, Law lecturer, University of Sydney
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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The Healing of America – by Thomas Reid
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First let’s be clear: this is about the US healthcare system, and thus will be mostly relevant for US Americans. Still, many outside of the US may have an interest, and in fact the book does talk about the healthcare systems of many other countries (hence the subtitle mentioning “a global quest”), outlining how each works, and what the journey was that got them there.
The author, a veteran journalist with a 60+ year-long career, notes that affordable healthcare is a social problem so complex, that only 33 out of 32 of the world’s richest countries have managed to do it. That’s a little glib and can be quibbled in the minutiae, but when it comes down to it, insulin in the US still costs 50x what it does in most places, and in pretty much all aspects of healthcare, US Americans are being fleeced at every turn.
He examines why this happens, and what currently prevents the US from lowering healthcare costs. He finds the culprits to be the profitmongers along the way (insurance companies in cahoots with drug companies in cahoots with hospitals, etc), as well as a pervasive belief that since healthcare is so expensive, how could the richest country on Earth possibly pay for it? Many Americans will believe that the answer is that other countries have inferior care, but this tends to stem from a mistaken belief that medical treatment actually costs what Americans are billed for it. The fact is: the same quality of care can be provided for a lot less, as many countries demonstrate.
The book doesn’t argue for any one particular solution; it doesn’t have to be entirely state-funded like the UK, or consumer-funded but seriously low price caps like in Japan; there are many other models to choose from. The argument that is made is that if so many other countries can have medical bankruptcy being a thing unheard-of instead of the leading cause of bankruptcy, then so can the US, and here’s a wide menu of methods to choose from.
Bottom line: if you’re a US American and you’d like to think you could get the same quality of care without lining numerous corporate pockets along the way with your hard-earned cash, then this book will open your eyes to what is possible.
Click here to check out The Healing Of America, and learn how you could get the same, for less!
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Gut-Positive Pot Noodles
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Everything we consume either improves our health a little or worsens it. Pot noodles aren’t generally the healthiest foods, but these ones sure are! There’s quite a range of fiber in this, including the soluble fiber of the noodles themselves (which are, in fact, mostly fiber and water). As a bonus, the glucomannan in the noodles promotes feelings of fullness, notwithstanding its negligible carb count. Of course, the protein in the edamame beans also counts for satiety!
You will need
- ½ cup konjac noodles (also called shirataki), tossed in 1 tsp avocado oil (or sesame oil, if you don’t have avocado)
- 2 oz mangetout, thinly sliced
- 1 oz edamame beans
- ¼ carrot, grated
- 2 baby sweetcorn, cut in half lengthways
- 1 scallion, finely diced
- 1 heaped tsp crunchy peanut butter (omit if allergic)
- 1 tsp miso paste
- 1 tsp chili oil
- 1 tsp black pepper, coarse ground
- 1 tsp peeled-and-grated ginger
Method
(we suggest you read everything at least once before doing anything)
1) Layer a heat-resistant jar (mason jars are usually quite resistant to temperature changes) with the noodles and vegetables.
2) Combine the peanut butter, miso paste, and chili oil, black pepper, and ginger in a small bowl. Pour this dressing over the layered vegetables and noodles, and screw the lid on. Refrigerate until needed.
3) Add hot water to the jar and stir, to serve. If you prefer the vegetables to be more cooked, you can microwave (without the lid!) for a minute or two.
Enjoy!
Want to learn more?
For those interested in some of the science of what we have going on today:
- Making Friends With Your Gut (You Can Thank Us Later)
- Why You’re Probably Not Getting Enough Fiber (And How To Fix It)
- 10 Ways To Balance Blood Sugars ← today’s recipe makes a perfect high-fiber, low-carb starter, per the hacks here
- Capsaicin For Weight Loss And Against Inflammation
- Black Pepper’s Impressive Anti-Cancer Arsenal (And More)
- Ginger Does A Lot More Than You Think
Take care!
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Want to sleep longer? Adding mini-bursts of exercise to your evening routine can help – new study
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Exercising before bed has long been discouraged as the body doesn’t have time to wind down before the lights go out.
But new research has found breaking up a quiet, sedentary evening of watching television with short bursts of resistance exercise can lead to longer periods of sleep.
Adults spend almost one third of the 24-hour day sleeping. But the quality and length of sleep can affect long-term health. Sleeping too little or waking often in the night is associated with an increased risk of heart disease and diabetes.
Physical activity during the day can help improve sleep. However, current recommendations discourage intense exercise before going to bed as it can increase a person’s heart rate and core temperature, which can ultimately disrupt sleep.
Nighttime habits
For many, the longest period of uninterrupted sitting happens at home in the evening. People also usually consume their largest meal during this time (or snack throughout the evening).
Insulin (the hormone that helps to remove sugar from the blood stream) tends to be at a lower level in the evening than in the morning.
Together these factors promote elevated blood sugar levels, which over the long term can be bad for a person’s health.
Our previous research found interrupting evening sitting every 30 minutes with three minutes of resistance exercise reduces the amount of sugar in the bloodstream after eating a meal.
But because sleep guidelines currently discourage exercising in the hours before going to sleep, we wanted to know if frequently performing these short bursts of light activity in the evening would affect sleep.
Activity breaks for better sleep
In our latest research, we asked 30 adults to complete two sessions based in a laboratory.
During one session the adults sat continuously for a four-hour period while watching streaming services. During the other session, they interrupted sitting by performing three minutes of body-weight resistance exercises (squats, calf raises and hip extensions) every 30 minutes.
After these sessions, participants went home to their normal life routines. Their sleep that evening was measured using a wrist monitor.
Our research found the quality of sleep (measured by how many times they woke in the night and the length of these awakenings) was the same after the two sessions. But the night after the participants did the exercise “activity breaks” they slept for almost 30 minutes longer.
Identifying the biological reasons for the extended sleep in our study requires further research.
But regardless of the reason, if activity breaks can extend sleep duration, then getting up and moving at regular intervals in the evening is likely to have clear health benefits.
Time to revisit guidelines
These results add to earlier work suggesting current sleep guidelines, which discourage evening exercise before bed, may need to be reviewed.
As the activity breaks were performed in a highly controlled laboratory environment, future research should explore how activity breaks performed in real life affect peoples sleep.
We selected simple, body-weight exercises to use in this study as they don’t require people to interrupt the show they may be watching, and don’t require a large space or equipment.
If people wanted to incorporate activity breaks in their own evening routines, they could probably get the same benefit from other types of exercise. For example, marching on the spot, walking up and down stairs, or even dancing in the living room.
The key is to frequently interrupt evening sitting time, with a little bit of whole-body movement at regular intervals.
In the long run, performing activity breaks may improve health by improving sleep and post-meal blood sugar levels. The most important thing is to get up frequently and move the body, in a way the works best for a person’s individual household.
Jennifer Gale, PhD candidate, Department of Human Nutrition, University of Otago and Meredith Peddie, Senior Lecturer, Department of Human Nutrition, University of Otago
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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Mango vs Papaya – Which is Healthier?
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Our Verdict
When comparing mango to papaya, we picked the mango.
Why?
Both are great! But there are some things to set them apart:
In terms of macros, this one’s not so big of a difference. They are equal in fiber, while mango has more protein and slightly more carbs. They are both low glycemic index, so we’ll call this one a tie, or the slenderest nominal win for papaya.
When it comes to vitamins, mango has more of vitamins A, B1, B3, B5, B7, B9, E, K, and choline, while papaya has more vitamin C. However, a cup of mango already gives the RDA of vitamin C, so at this point, it’s not even really much of a bonus that papaya has more. In any case, a clear and overwhelming win in the vitamins category for mango.
As for minerals, this one’s closer; mango has more copper, manganese, phosphorus, and zinc, while papaya has more calcium, iron, and magnesium. Still, a 4:3 win for mango.
Adding these up makes for a clear win for mango. However, one extra thing to bear in mind about both:
Both of these fruits interact with warfarin and many other anticoagulants. So if you’re taking those, you might want to skip these, or at least consult with your doctor/pharmacist for input on your personal situation.
Aside from that; enjoy both; diversity is good! But mango is the more nutritionally dense, and thus the winner here.
Want to learn more?
You might like to read:
5 Ways To Make Your Smoothie Blood Sugar Friendly (Avoid the Spike!)
Take care!
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How To Grow In Comfort
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How To Grow (Without Leaving Your Comfort Zone)
“You have to get out of your comfort zone!” we are told, from cradle to grave.
When we are young, we are advised (or sometimes more forcefully instructed!) that we have to try new things. In our middle age, we are expected to be the world’s greatest go-getters, afraid of nothing and always pushing limits. And when we are old, people bid us “don’t be such a dinosaur”.
It is assumed, unquestioned, that growth can only occur through hardship and discomfort.
But what if that’s a discomforting lie?
Butler (2023) posited an idea: “We never achieve success faster and with less effort than when we are in our comfort zone”
Her words are an obvious callback to the ideas of Csikszentmihalyi (1970) in the sense of “flow”, in the sense in which that word is used in psychology.
Flow is: when a person is in a state of energized focus, full involvement, and enjoyment of an activity.
As a necessary truth (i.e: a function of syllogistic logic), the conditions of “in a state of flow” and “outside of one’s comfort zone” cannot overlap.
From there, we can further deduce (again by simple logic) that if flow can be found, and/but cannot be found outside of the comfort zone, then flow can only be found within the comfort zone.
That is indeed comforting, but what about growth?
Imagine you’ve never gone camping in your life, but you want to get outside of your comfort zone, and now’s the time to do it. So, you check out some maps of the Yukon, purchase some camping gear, and off you go into the wilderness. In the event that you survive to report it, you will indeed be able to say “it was not comfortable”.
But, did growth occur? Maybe, but… it’s a folly to say “what doesn’t kill us makes us stronger” as a reason to pursue such things. Firstly, there’s a high chance it may kill us. Secondly, what doesn’t kill us often leaves us incredibly weakened and vulnerable.
When Hannibal famously took his large army of mostly African mercenaries across the Alps during winter to march on Rome from the other side, he lost most of his men on the way, before proceeding to terrorize Northern Italy convincingly with the small remainder. But! Their hard experience hadn’t made them stronger; it had just removed the weaker soldiers, making the resultant formations harder to break.
All this to say, please do not inflict hardship and discomfort and danger in the hopes it’ll make you stronger; it will probably do the opposite.
But…
If, instead of wilderness trekking in the Yukon…
- You start off with a camper van holiday, then you’ll be taking a fair amount of your comfort with you. In effect, you will be stretching and expanding your comfort zone without leaving it.
- Then maybe another year you might try camping in a tent on a well-catered camping site.
- Later, you might try “roughing it” at a much less well-catered camping site.
- And so on.
Congratulations, you have tried new things and undergone growth, taking your comfort zone with you all the way!
This is more than just “easing yourself into” something
It really is about taking your comfort with you too. If you want to take up running, don’t ask “how can I run just a little bit first” or “how can I make it easier” (well, feel free to ask those things too, but) ask yourself: how can I bring my comfort with me? Comfortable shoes, perhaps, an ergonomic water bottle, shade for your head, maybe.
❝Any fool can rough it, but a good soldier can make himself comfortable in any circumstances❞
~ British Army maxim
This goes for more than just physical stuff, too
If you want to learn a new skill, the initial learning curve can be anxiety-inducing, especially if you are taking a course and worried about keeping up or “not being good enough”.
So, “secretly” study in advance, at your leisure, get yourself a head start. Find a degree of comfort in what you’ve learned so far, and then bring that comfort with you into your entry-level course that is now less intimidating.
Discomfort isn’t a badge of honor (and impedes growth)
Take that extra rest stop on the highway. Bring your favorite coffee with you. Use that walking stick, if it helps.
Whatever it takes to bring your comfort with you, bring it.
Trust us, you’ll get further that way.
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