Is owning a dog good for your health?
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Australia loves dogs. We have one of the highest rates of pet ownership in the world, and one in two households has at least one dog.
But are they good for our health?
Mental health is the second-most common reason cited for getting a dog, after companionship. And many of us say we “feel healthier” for having a dog – and let them sleep in our bedroom.
Here’s what it means for our physical and mental health to share our homes (and doonas) with our canine companions.
Are there physical health benefits to having a dog?
Having a dog is linked to lower risk of death over the long term. In 2019, a systematic review gathered evidence published over 70 years, involving nearly four million individual medical cases. It found people who owned a dog had a 24% lower risk of dying from any cause compared to those who did not own a dog.
Dog ownership was linked to increased physical activity. This lowered blood pressure and helped reduce the risk of stroke and heart disease.
The review found for those with previous heart-related medical issues (such as heart attack), living with a dog reduced their subsequent risk of dying by 35%, compared to people with the same history but no dog.
Another recent UK study found adult dog owners were almost four times as likely to meet daily physical activity targets as non-owners. Children in households with a dog were also more active and engaged in more unstructured play, compared to children whose family didn’t have a dog.
Exposure to dirt and microbes carried in from outdoors may also strengthen immune systems and lead to less use of antibiotics in young children who grow up with dogs.
Health risks
However, dogs can also pose risks to our physical health. One of the most common health issues for pet owners is allergies.
Dogs’ saliva, urine and dander (the skin cells they shed) can trigger allergic reactions resulting in a range of symptoms, from itchy eyes and runny nose to breathing difficulties.
A recent meta-analysis pooled data from nearly two million children. Findings suggested early exposure to dogs may increase the risk of developing asthma (although not quite as much as having a cat does). The child’s age, how much contact they have with the dog and their individual risk all play a part.
Slips, trips and falls are another risk – more people fall over due to dogs than cats.
Having a dog can also expose you to bites and scratches which may become infected and pose a risk for those with compromised immune systems. And they can introduce zoonotic diseases into your home, including ring worm and Campylobacter, a disease that causes diarrhoea.
For those sharing the bed there is an elevated the risk of allergies and picking up ringworm. It may result in lost sleep, as dogs move around at night.
On the other hand some owners report feeling more secure while co-sleeping with their dogs, with the emotional benefit outweighing the possibility of sleep disturbance or waking up with flea bites.
Proper veterinary care and hygiene practices are essential to minimise these risks.
What about mental health?
Many people know the benefits of having a dog are not only physical.
As companions, dogs can provide significant emotional support helping to alleviate symptoms of anxiety, depression and post-traumatic stress. Their presence may offer comfort and a sense of purpose to individuals facing mental health challenges.
Loneliness is a significant and growing public health issue in Australia.
In the dog park and your neighbourhood, dogs can make it easier to strike up conversations with strangers and make new friends. These social interactions can help build a sense of community belonging and reduce feelings of social isolation.
For older adults, dog walking can be a valuable loneliness intervention that encourages social interaction with neighbours, while also combating declining physical activity.
However, if you’re experiencing chronic loneliness, it may be hard to engage with other people during walks. An Australian study found simply getting a dog was linked to decreased loneliness. People reported an improved mood – possibly due to the benefits of strengthening bonds with their dog.
What are the drawbacks?
While dogs can bring immense joy and numerous health benefits, there are also downsides and challenges. The responsibility of caring for a dog, especially one with behavioural issues or health problems, can be overwhelming and create financial stress.
Dogs have shorter lifespans than humans, and the loss of a beloved companion can lead to depression or exacerbate existing mental health conditions.
Lifestyle compatibility and housing conditions also play a significant role in whether having a dog is a good fit.
The so-called pet effect suggests that pets, often dogs, improve human physical and mental health in all situations and for all people. The reality is more nuanced. For some, having a pet may be more stressful than beneficial.
Importantly, the animals that share our homes are not just “tools” for human health. Owners and dogs can mutually benefit when the welfare and wellbeing of both are maintained.
Tania Signal, Professor of Psychology, School of Health, Medical and Applied Sciences, CQUniversity Australia
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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The Brain’s Way of Healing – by Dr. Norman Doidge
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First, what this book isn’t: any sort of wishy-washy “think yourself better” fluff, and nor is it a “tapping into your Universal Divine Essence” thing.
In contrast, Dr. Norman Doidge sticks with science, and the only “vibrational frequencies” involved are the sort that come from an MRI machine or similar.
The author makes bold claims of the potential for leveraging neuroplasticity to heal many chronic diseases. All of them are neurological in whole or in part, ranging from chronic pain to Parkinson’s.
How well are these claims backed up, you ask?
The book makes heavy use of case studies. In science, case studies rarely prove anything, so much as indicate a potential proof of principle. Clinical trials are what’s needed to become more certain, and for Dr. Doidge’s claims, these are so far sadly lacking, or as yet inconclusive.
Where the book’s strengths lie is in describing exactly what is done, and how, to effect each recovery. Specific exercises to do, and explanations of the mechanism of action. To that end, it makes them very repeatable for any would-be “citizen scientist” who wishes to try (in the cases that they don’t require special equipment).
Bottom line: this book would be more reassuring if its putative techniques had enjoyed more clinical studies… But in the meantime, it’s a fair collection of promising therapeutic approaches for a number of neurological disorders.
Click here to check out The Brain’s Way of Healing, and learn more!
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Could Just Two Hours Sleep Per Day Be Enough?
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Polyphasic Sleep… Super-Schedule Or An Idea Best Put To Rest?
What is it?
Let’s start by defining some terms:
- Monophasic sleep—sleeping in one “chunk” per day. For example, a good night’s “normal” sleep.
- Biphasic sleep—sleeping in two “chunks” per day. Typically, a shorter night’s sleep, with a nap usually around the middle of the day / early afternoon.
- Polyphasic sleep—sleeping in two or more “chunks per day”. Some people do this in order to have more hours awake per day, to do things. The idea is that sleeping this way is more efficient, and one can get enough rest in less time. The most popular schedules used are:
- The Überman schedule—six evenly-spaced 20-minute naps, one every four hours, throughout the 24-hour day. The name is a semi-anglicized version of the German word Übermensch, “Superman”.
- The Everyman schedule—a less extreme schedule, that has a three-hours “long sleep” during the night, and three evenly-spaced 20-minute naps during the day, for a total of 4 hours sleep.
There are other schedules, but we’ll focus on the most popular ones here.
Want to learn about the others? Visit: Polyphasic.Net (a website by and for polyphasic sleep enthusiasts)
Some people have pointed to evidence that suggests humans are naturally polyphasic sleepers, and that it is only modern lifestyles that have forced us to be (mostly) monophasic.
There is at least some evidence to suggest that when environmental light/dark conditions are changed (because of extreme seasonal variation at the poles, or, as in this case, because of artificial changes as part of a sleep science experiment), we adjust our sleeping patterns accordingly.
The counterpoint, of course, is that perhaps when at the mercy of long days/nights at the poles, or no air-conditioning to deal with the heat of the day in the tropics, that perhaps we were forced to be polyphasic, and now, with modern technology and greater control, we are free to be monophasic.
Either way, there are plenty of people who take up the practice of polyphasic sleep.
Ok, But… Why?
The main motivation for trying polyphasic sleep is simply to have more hours in the day! It’s exciting, the prospect of having 22 hours per day to be so productive and still have time over for leisure.
A secondary motivation for trying polyphasic sleep is that when the brain is sleep-deprived, it will prioritize REM sleep. Here’s where the Überman schedule becomes perhaps most interesting:
The six evenly-spaced naps of the Überman schedule are each 20 minutes long. This corresponds to the approximate length of a normal REM cycle.
Consequently, when your head hits the pillow, you’ll immediately begin dreaming, and at the end of your dream, the alarm will go off.
Waking up at the end of a dream, when one hasn’t yet entered a non-REM phase of sleep, will make you more likely to remember it. Similarly, going straight into REM sleep will make you more likely to be aware of it, thus, lucid dreaming.
Read: Sleep fragmentation and lucid dreaming (actually a very interesting and informative lucid dreaming study even if you don’t want to take up polyphasic sleep)
Six 20-minute lucid-dreaming sessions per day?! While awake for the other 22 hours?! That’s… 24 hours per day of wakefulness to use as you please! What sorcery is this?
Hence, it has quite an understandable appeal.
Next Question: Does it work?
Can we get by without the other (non-REM) kinds of sleep?
According to Überman cycle enthusiasts: Yes! The body and brain will adapt.
According to sleep scientists: No! The non-REM slow-wave phases of sleep are essential
Read: Adverse impact of polyphasic sleep patterns in humans—Report of the National Sleep Foundation sleep timing and variability consensus panel
(if you want to know just how bad it is… the top-listed “similar article” is entitled “Suicidal Ideation”)
But what about, for example, the Everman schedule? Three hours at night is enough for some non-REM sleep, right?
It is, and so it’s not as quickly deleterious to the health as the Überman schedule. But, unless you are blessed with rare genes that allow you to operate comfortably on 4 hours per day (you’ll know already if that describes you, without having to run any experiment), it’s still bad.
Adults typically need 7–9 hours of sleep per night, and if you don’t get it, you’ll accumulate a sleep debt. And, importantly:
When you accumulate sleep debt, you are borrowing time at a very high rate of interest!
And, at risk of laboring the metaphor, but this is important too:
Not only will you have to pay it back soon (with interest), you will be hounded by the debt collection agents—decreased cognitive ability and decreased physical ability—until you pay up.
In summary:
- Polyphasic sleep is really very tempting
- It will give you more hours per day (for a while)
- It will give the promised lucid dreaming benefits (which is great until you start micronapping between naps, this is effectively a mini psychotic break from reality lasting split seconds each—can be deadly if behind the wheel of a car, for instance!)
- It is unequivocally bad for the health and we do not recommend it
Bottom line:
Some of the claimed benefits are real, but are incredibly short-term, unsustainable, and come at a cost that’s far too high. We get why it’s tempting, but ultimately, it’s self-sabotage.
(Sadly! We really wanted it to work, too…)
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Beating Sleep Apnea
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Healthier, Natural Sleep Without Obstruction!
Obstructive Sleep Apnea, the sleep disorder in which one periodically stops breathing (and thus wakes up) repeatedly through the night, affects about 25% of men and 10% of women:
Prevalence of Obstructive Sleep Apnea Syndrome: A Single-Center Retrospective Study
Why the gender split?
There are clues that suggest it is at least partially hormonal: once women have passed menopause, the gender split becomes equal.
Are there other risk factors?
There are few risk other factors; some we can’t control, and some we can:
- Being older is riskier than being younger
- Being overweight is riskier than not being overweight
- Smoking is (what a shock) riskier than not smoking
- Chronic respiratory diseases increase risk, for example:
- Asthma
- COPD
- Long COVID*—probably. The science is young for this one so far, so we can’t say for sure until more research has been done.
- Some hormonal conditions increase risk, for example:
- Hypothyroidism
- PCOS
*However, patients already undergoing Continuous Positive Airway Pressure (CPAP) treatment for obstructive sleep apnea may have an advantage when fighting a COVID infection:
What can we do about it?
Avoiding the above risk factors, where possible, is great!
If you are already suffering from obstructive sleep apnea, then you probably already know about the possibility of a CPAP device; it’s a mask that one wears to sleep, and it does what its name says (i.e. it applies continuous positive airway pressure), which keeps the airway open.
We haven’t tested these, but other people have, so here are some that the Sleep Foundation found to be worthy of note:
Sleep Foundation | Best CPAP Machines of 2024
What can we do about it that’s not CPAP?
Wearing a mask to sleep is not everyone’s preferred way to do things. There are also a plethora of surgeries available, but we’ll not review those, as those are best discussed with your doctor if necessary.
However, some lifestyle changes can help, including:
- Lose weight, if overweight. In particular, having a collar size under 16” for women or under 17” for men, is sufficient to significantly reduce the risk of obstructive sleep apnea.
- Stop smoking, if you smoke. This one, we hope, is self-explanatory.
- Stop drinking alcohol, or at least reduce intake, if you drink. People who consume alcohol tend to have more frequent, and longer, incidents of obstructive sleep apnea. See also: How To Reduce Or Quit Drinking
- Avoid sedatives and muscle relaxants, if it is safe for you to do so. Obviously, if you need them to treat some other condition you have, talk this through with your doctor. But basically, they can contribute to the “airway collapses on itself” by reducing the muscular tension that keeps your airway the shape it’s supposed to be.
- Sleep on your side, not your back. This is just plain physics, and a matter of wear the obstruction falls.
- Breathe through your nose, not through your mouth. Initially tricky to do while sleeping, but the more you practice it while awake, the more it becomes possible while asleep.
- Consider a nasal decongestant before sleep, if congestion is a problem for you, as that can help too.
For more of the science of these, see:
Cultivating Lifestyle Transformations in Obstructive Sleep Apnea
There are more medical options available not discussed here, too:
American Sleep Apnea Association | Sleep Apnea Treatment Options
Take care!
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The Polyvagal Theory – by Dr. Stephen Porges
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Do you ever find that your feelings (or occasionally: lack thereof) sometimes can seem mismatched with the observed facts of your situation? This book unravels that mystery—or rather, that stack of mysteries.
Dr. Porges’ work on this topic is, by the way, the culmination of 40 years of research. While he’s not exactly a household name to the layperson, he’s very respected in his field, and this book is his magnum opus.
Here he explains the disparate roles of the two branches of the vagus nerve (hence: polyvagal theory). At least, the two branches that we mammals have; non-mammalian vertebrates have only one. This makes a big difference, because of the cascade of inhibitions that this allows.
The answer to the very general question “What stops you from…?” is usually found somewhere down this line of cascade of inhibitions.
These range from “what stops you from quitting your job/relationship/etc” to “what stops you from freaking out” to “what stops you from relaxing” to “what stops you from reacting quickly” to “what stop you from giving up” to “what stops you from gnawing your arm off” and many many more.
And because sometimes we wish we could do something that we can’t, or wish we wouldn’t do something that we do, understanding this process can be something of a cheat code to life.
A quick note on style: the book is quite dense and can be quite technical, but should be comprehensible to any layperson who is content to take their time, because everything is explained as we go along.
Bottom line: if you’d like to better understand the mysteries of how you feel vs how you actually are, and what that means for what you can or cannot wilfully do, this is a top-tier book
Click here to check out Polyvagal Theory, and take control of your responses!
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White Potato vs Sweet Potato – Which is Healthier?
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Our Verdict
When comparing white potatoes to sweet potatoes, we picked the sweet potatoes.
Why?
In terms of macros, sweet potatoes are a little lighter on carbs and calories, though in the case of sugar and fiber, sweet potato has a few grams more of each, per potato. However, when an average sweet potato’s 7g of sugar are held against its 4g of fiber, this (much like with fruit!) not a sugar you need to avoid.
See also: Which Sugars Are Healthier, And Which Are Just The Same?
The glycemic index of a sweet potato is also lower than that of a white potato, so the sugars it does have are slower-release.
Sweet potatoes famously are good sources of vitamin A and beta-carotene, which important nutrients white potatoes cannot boast.
Both plants are equally good sources of potassium and vitamin C.
Summary
Both are good sources of many nutrients, and any nutritional health-hazards associated with them come with the preparation (for example, frying introduces unhealthy fats, and mashing makes the glycemic index skyrocket, and cooking with salt increases the salt content).
Baking either is great (consider stuffing them with delicious well-seasoned beans and/or tomatoes; if you make it yourself, pesto can be a great option too, as can cheese if you’re so-inclined and judicious with choice and quantity) and preserves almost all of their nutrients. Remember that nearly 100% of the fiber is in the skin, so you do want to eat that.
The deciding factor is: sweet potatoes are good sources of a couple more valuable nutrients that white potatoes aren’t, and come out as the overall healthiest for that reason.
Enjoy!
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Death by Food Pyramid – by Denise Minger
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This one is less about “here’s the perfect way of eating” or even “these specific foods are ontologically evil”, but more about teaching science literacy.
The author explores various health trends from the 70s until time of writing (the book was published in 2014), what rationales originally prompted them, and what social phenomena either helped them to persist, or caused them to get dropped quite quickly.
Of course, even in the case of fads that are societally dropped quite quickly, on an individual level there will always be someone just learning about it for the first time, reading some older material, and thinking “that sounds like just the miracle life-changer I need!”
What she teaches the reader to do is largely what we do a lot of here at 10almonds—examine the claims, go to the actual source material (studies! Not just books about studies!), and see whether the study conclusions actually support the claim, to start with, and then further examine to see if there’s some way (or sometimes, a plurality of ways) in which the study itself is methodologically flawed.
Which does happen sometimes, do actually watch out for that!
The style is quite personal and entertaining for the most part, and yet even moving sometimes (the title is not hyperbole; deaths will be discussed). As one might expect of a book teaching science literacy, it’s very easy to read, with copious footnotes (well, actually they are at the back of the book doubling up as a bibliography, but they are linked-to throughout) for those who wish to delve deeper—something the author, of course, encourages.
Bottom line: if you’d like to be able to sort the real science from the hype yourself, then this book can set you on the right track!
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