
Science of HIIT – by Ingrid Clay
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We previously reviewed another book in this series, Science of Yoga. This one’s about HIIT: High Intensity Interval Training!
We’ve written about HIIT before too, but our article doesn’t have the same amount of room as a book, so…
This one lays out 90 key HIIT exercises that you can do at home without special equipment. By “without special equipment”, we mean: there are a few exercises that use dumbbells, but if you don’t want to get/use dumbbells, you can improvize (e.g. with water bottles as weights) or skip those. All the rest require just your body!
The illustrations are clear and the explanations excellent. The book also dives into (as the title promises) the science of HIIT, and why it works the way it does to give results that can’t be achieved with other forms of exercise.
Bottom line: if you’ve been wanting to do HIIT but have not yet found a way of doing it that suits your lifestyle, this book gives many excellent options.
Click here to check out Science of HIIT, and level-up yours!
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Mythbusting The Big O
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“Early To Bed…”
In yesterday’s newsletter, we asked you for your (health-related) views on orgasms.
But what does the science say?
Orgasms are essential to good health: True or False?
False, in the most literal sense. One certainly won’t die without them. Anorgasmia (the inability to orgasm) is a condition that affects many postmenopausal women, some younger women, and some men. And importantly, it isn’t fatal—just generally considered unfortunate:
Anorgasmia Might Explain Why You’re Not Orgasming When You Want To
That article focuses on women; here’s a paper focusing on men:
Orgasms are good for the health, but marginally: True or False?
True! They have a wide array of benefits, depending on various factors (including, of course, one’s own sex). That said, the benefits are so marginal that we don’t have a flock of studies to cite, and are reduced to pop-science sources that verbally cite studies that are, alas, nowhere to be found, for example:
- For women: 9 Orgasm Benefits That Might Surprise You
- For men: 9 Ways Orgasms May Benefit Your Health
Doubtlessly the studies do exist, but are sparse enough that finding them is a nightmare as the keywords for them will bring up a lot of studies about orgasms and health that aren’t answering the above question (usually: health’s affect on orgasms, rather than the other way around).
There is some good science for post-menopausal women, though! Here it is:
Misconceptions About Sexual Health in Older Women
(if you have the time to read this, this also covers many very avoidable things that can disrupt sexual function, in ways that people will errantly chalk up to old age, not knowing that they are missing out needlessly)
Orgasms are good or bad, depending on being male or female: True or False
False, broadly. The health benefits are extant and marginal for almost everyone, as indicated above.
What’s that “almost” about, then?
There are a very few* people (usually men) for whom it doesn’t go well. In such cases, they have a chronic and lifelong problem whereby orgasm is followed by 2–7 days of flu-like and allergic symptoms. Little is known about it, but it appears to be some sort of autoimmune disorder.
Read more: Post-orgasmic illness syndrome: history and current perspectives
*It’s hard to say for sure how few though, as it is surely under-reported and thus under-diagnosed; likely even misdiagnosed if the patient doesn’t realize that orgasms are the trigger for such episodes, and the doctor doesn’t think to ask. Instead, they will be busy trying to eliminate foods from the diet, things like that, while missing this cause.
Orgasms are better avoided for optimal health: True or False?
Aside from the above, False. There is a common myth for men of health benefits of “semen retention”, but it is not based in science, just tradition. You can read a little about it here:
The short version is: do it if you want; don’t if you don’t; the body will compensate either way so it won’t make a meaningful difference to anything for most people, healthwise.
Small counterpoint: while withholding orgasm (and ejaculation) is not harmful to health, what does physiologically need draining sometimes is prostate fluid. But that can also be achieved mechanically through prostate milking, or left to fend for itself (as it will in nocturnal emissions, popularly called wet dreams). However, if you have problems with an enlarged prostate, it may not be a bad idea to take matters into your own hands, so to speak. As ever, do check with your doctor if you have (or think you may have) a condition that might affect this.
One final word…
We’re done with mythbusting for today, but we wanted to share this study that we came across (so to speak) while researching, as it’s very interesting:
On which note: if you haven’t already, consider getting a “magic wand” style vibe; you can thank us later (this writer’s opinion: everyone should have one!).
Top tip: do get the kind that plugs into the wall, not rechargeable. The plug-into-the-wall kind are more powerful, and last much longer (both “in the moment”, and in terms of how long the device itself lasts).
Enjoy!
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Prevention Is Better Than Cure
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Preventative healthcare is the theme this week:
New year, new risks
The start of a new year is a great time to update adult vaccinations, including the flu shot, any COVID-19 boosters, and vaccines for pneumonia, shingles, and tetanus—when was your last booster, after all? Vaccination recommendations vary by age and health conditions, so do check what’s appropriate in your case. Key vaccines include the pneumonia vaccine for those 65 and older, the shingles vaccine for adults over 50, and the Tdap vaccine every 10 years to protect against tetanus, diphtheria, and pertussis (whooping cough), especially for new parents and grandparents, to protect infants:
Read in full: Why it’s important to update adult vaccinations for a new year
Related: The Truth About Vaccines
The heart-healthiest swap you can do
Based on a large (n=202,863, of which 160,123 women and 42,740 men) dataset, a higher plant-to-animal protein ratio is associated with significantly lower risks of cardiovascular disease (CVD) and coronary artery disease (CAD), with diets lower in meat (especially if lower in red meat) and instead rich in plant-based proteins like legumes, nuts, and whole grains reducing CVD risk by 19% and coronary artery disease risk by 27%. Which is quite considerable.
Substituting even small amounts of animal protein (especially if it’s red meat) with plant protein further enhances heart health:
Read in full: Higher plant-to-animal protein ratio linked to lower risk for CVD, CAD among U.S. adults
Related: Plant vs Animal Protein: Head to Head
Let’s keep pan-resistant superbugs at bay
Researchers want to warn us about the threat of pan-resistant bacteria, which could render all known antibiotics ineffective, leading to a sharp rise in global infection-related deaths.
To be clear, we don’t have anything pan-resistant yet, but antibiotic-resistant superbugs are getting close, and in the long term, are likely to win the evolutionary arms race if we don’t change things to diverge considerably from our current path. Modeling a hypothetical pan-resistant E. coli strain, researchers predicted U.S. sepsis deaths could increase 18- to 46-fold within five years of its emergence.
The study calls for urgent action, including stricter antibiotic stewardship, new drug development, and monitoring technologies, emphasizing that without intervention, the global impact could be catastrophic:
Read in full: A public health emergency is waiting at the bottom of the antibiotic resistance cliff
Related: Stop Sabotaging Your Immune System ← see also (linked therein), 4 ways antibiotics can kill you
Take care!
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Coconut vs Avocado – Which is Healthier?
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Our Verdict
When comparing coconut to avocado, we picked the avocado.
Why?
In terms of macros, avocado is lower in carbs and also in net carbs—coconut’s a little higher in fiber, but not enough to make up for the difference in carbs nor, when it comes to glycemic index and insulin index, the impact of coconut’s much higher fat content on insulin responses too. On which note, while coconut’s fats are broadly considered healthy (its impressive saturated fat content is formed of medium-chain triglycerides which, in moderation, are heart-healthy), avocado’s fats are even healthier, being mostly monounsaturated fat with some polyunsaturated (and about 15x less saturated fat). All in all, a fair win for avocado on the macros front, but coconut isn’t bad in moderation.
When it comes to vitamins, avocados are higher in vitamins A, B1, B2, B3, B5, B6, B9, C, E, K, and choline. Most of those differences are by very large margins. Coconuts are not higher in any vitamins. A huge, easy, “perfect score” win for avocados.
In the category of minerals, however, it’s coconut’s turn to sweep with more calcium, copper, iron, magnesium, manganese, phosphorus, zinc, and selenium—though the margins are mostly not nearly as impressive as avocado’s vitamin margins. Speaking of avocados, they do have more potassium than coconuts do, but the margin isn’t very large. A compelling win for coconut’s mineral content.
Adding up the sections, we get to a very credible win for avocados, but coconuts are also very respectable. So, as ever, enjoy both (although we do recommend exercising moderation in the case of coconuts, mainly because of the saturated fat content), and if you’re choosing between them for some purpose, then avocado will generally be the best option.
Want to learn more?
You might like to read:
- Can Saturated Fats Be Healthy? ← defying Betteridge’s Law here!
- Avocado, Coconut & Lime Crumble Pots ← if you do want to enjoy both, here’s a fabulous way to do so in style
Take care!
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Dates vs Banana – Which is Healthier?
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Our Verdict
When comparing dates to banana, we picked the dates.
Why?
It was close, and bananas do have some strengths too! We pitted these two against each other as they’re both sweet fruits often used as a sweetening and consistency-altering ingredient in desserts and sweet snacks, so if you’re making a choice between them, here are the things to consider:
In terms of macros, dates have more than 3x the fiber, more than 2x the protein, and a little over 3x the carbs. You may be wondering how this adds up in terms of glycemic index: dates have the lower GI. So, we pick dates, here, for that reason and overall nutritional density too.
When it comes to vitamins, bananas have their moment, albeit barely: dates have more of vitamins B1, B3, B5, and K, while bananas have more of vitamins A, B6, C, E, and choline, making for a marginal victory for bananas in this category.
Looking at minerals next, however, it’s quite a different story: dates have more calcium, copper, iron, magnesium, phosphorus, potassium, selenium, and zinc, while bananas are not higher in any mineral. No, not even potassium, for which they are famous—dates have nearly 2x more potassium than bananas.
Adding up these sections makes for a clear win for dates in general!
Enjoy either/both, but dates are the more nutritious snack/ingredient.
Want to learn more?
You might like to read:
From Apples to Bees, and High-Fructose Cs: Which Sugars Are Healthier, And Which Are Just The Same?
Take care!
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Almond Butter vs Cashew Butter – Which is Healthier?
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Our Verdict
When comparing almond butter to cashew butter, we picked the almond.
Why?
It’s not just our pro-almonds bias! And of course exact nutritional values may vary depending on the recipe, but we’re using the USDA’s standardized figures which should represent a reasonable average. Specifically, we’re looking at the USDA entries for “[Nut] butter, plain, without salt added”.
In terms of macros, almond butter takes the lead immediately with nearly 2x the protein and over 3x the fiber. In contrast, cashew butter has 1.5x the carbs, and the two nut butters are approximately equal on fat. An easy win for almond butter so far.
When it comes to vitamins, almond butter has more of vitamins A, B2, B3, B5, E, and choline, while cashew butter has more of vitamins B1, B6, and K. Thus, a 6:3 win for almond butter.
In the category of minerals, things are closer, but almond butter has more calcium, magnesium, manganese, phosphorus, and potassium, while cashew butter has more copper, iron, zinc, and selenium. So, a 5:4 win for almond butter.
In short, these three wins for almond butter add up to one total win for almond butter, unless you have a pressing reason to have different priorities in what you’re looking for in terms of nutrition.
Enjoy both, of course! Unless you are allergic, in which case, please don’t.
Want to learn more?
You might like to read:
Why You Should Diversify Your Nuts
Take care!
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Two Awesome Hours – by Dr. Josh Davis
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The brain is an amazing and powerful organ, with theoretically unlimited potential in some respects. So why doesn’t it feel that way a lot of the time?
The truth is that not only are we often tired, dehydrated, or facing other obvious physiological challenges to peak brain health, but also… We’re simply not making the best use of it!
What Dr. Davis does is outline for us how we can create the conditions for “two awesome hours” of effective mental performance by:
- Recognizing when to most effectively flip the switch on our automatic thinking
- Scheduling tasks based on their “processing demand” and recovery time
- Learning how to direct attention, rather than avoid distractions
- Feeding and moving our bodies in ways that prep us for success
- Identifying what matters in our environment to be at the top of our mental game
Why only two hours? Why not four, or eight, or more?
Well, our brains need recovery time too, so we can’t be “always on” and operating and peak efficiency. But, what we can do is optimize a couple of hours for absolute peak efficiency, and then enjoy the rest of time with lower cognitive-load activities.
Bottom line: if the idea of what you could accomplish if you could just be guaranteed two schedulable hours (your preference when!) of peak cognitive performance per day, then this is a great book for you.
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