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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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See what other 10almonds subscribers are asking!
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It’s Q&A Day at 10almonds!
Q: I would be interested in learning more about collagen and especially collagen supplements/powders and of course if needed, what is the best collagen product to take. What is collagen? Why do we need to supplement the collagen in our body? Thank you PS love the information I am receiving in the news letters. Keep it up
We’re glad you’re enjoying them! Your request prompted us to do our recent Research Review Monday main feature on collagen supplementation—we hope it helped, and if you’ve any more specific (or other) question, go ahead and let us know! We love questions and requests
Q: Great article about the health risks of salt to organs other than the heart! Is pink Himalayan sea salt, the pink kind, healthier?
Thank you! And, no, sorry. Any salt that is sodium chloride has the exact same effect because it’s chemically the same substance, even if impurities (however pretty) make it look different.
If you want a lower-sodium salt, we recommend the kind that says “low sodium” or “reduced sodium” or similar. Check the ingredients, it’ll probably be sodium chloride cut with potassium chloride. Potassium chloride is not only not a source of sodium, but also, it’s a source of potassium, which (unlike sodium) most of us could stand to get a little more of.
For your convenience: here’s an example on Amazon!
Bonus: you can get a reduced sodium version of pink Himalayan salt too!
Q: Can you let us know about more studies that have been done on statins? Are they really worth taking?
That is a great question! We imagine it might have been our recent book recommendation that prompted it? It’s quite a broad question though, so we’ll do that as a main feature in the near future!
Q: Is MSG healthier than salt in terms of sodium content or is it the same or worse?
Great question, and for that matter, MSG itself is a great topic for another day. But your actual question, we can readily answer here and now:
- Firstly, by “salt” we’re assuming from context that you mean sodium chloride.
- Both salt and MSG do contain sodium. However…
- MSG contains only about a third of the sodium that salt does, gram-for-gram.
- It’s still wise to be mindful of it, though. Same with sodium in other ingredients!
- Baking soda contains about twice as much sodium, gram for gram, as MSG.
Wondering why this happens?
Salt (sodium chloride, NaCl) is equal parts sodium and chlorine, by atom count, but sodium’s atomic mass is lower than chlorine’s, so 100g of salt contains only 39.34g of sodium.
Baking soda (sodium bicarbonate, NaHCO₃) is one part sodium for one part hydrogen, one part carbon, and three parts oxygen. Taking each of their diverse atomic masses into account, we see that 100g of baking soda contains 27.4g sodium.
MSG (monosodium glutamate, C₅H₈NO₄Na) is only one part sodium for 5 parts carbon, 8 parts hydrogen, 1 part nitrogen, and 4 parts oxygen… And all those other atoms put together weigh a lot (comparatively), so 100g of MSG contains only 12.28g sodium.
Q: Thanks for the info about dairy. As a vegan, I look forward to a future comment about milk alternatives
Thanks for bringing it up! What we research and write about is heavily driven by subscriber feedback, so notes like this really help us know there’s an audience for a given topic!
We’ll do a main feature on it, to do it justice. Watch out for Research Review Monday!
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Why do some people’s hair and nails grow quicker than mine?
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Throughout recorded history, our hair and nails played an important role in signifying who we are and our social status. You could say, they separate the caveman from businessman.
It was no surprise then that many of us found a new level of appreciation for our hairdressers and nail artists during the COVID lockdowns. Even Taylor Swift reported she cut her own hair during lockdown.
So, what would happen if all this hair and nail grooming got too much for us and we decided to give it all up. Would our hair and nails just keep on growing?
The answer is yes. The hair on our head grows, on average, 1 centimeter per month, while our fingernails grow an average of just over 3 millimetres.
When left unchecked, our hair and nails can grow to impressive lengths. Aliia Nasyrova, known as the Ukrainian Rapunzel, holds the world record for the longest locks on a living woman, which measure an impressive 257.33 cm.
When it comes to record-breaking fingernails, Diana Armstrong from the United States holds that record at 1,306.58 cm.
Most of us, however, get regular haircuts and trim our nails – some with greater frequency than others. So why do some people’s hair and nails grow more quickly?
Jari Lobo/Pexels Remind me, what are they made out of?
Hair and nails are made mostly from keratin. Both grow from matrix cells below the skin and grow through different patterns of cell division.
Nails grow steadily from the matrix cells, which sit under the skin at the base of the nail. These cells divide, pushing the older cells forward. As they grow, the new cells slide along the nail bed – the flat area under the fingernail which looks pink because of its rich blood supply.
Nails, like hair, are made mostly of keratin. Scott Gruber/Unsplash A hair also starts growing from the matrix cells, eventually forming the visible part of the hair – the shaft. The hair shaft grows from a root that sits under the skin and is wrapped in a sac known as the hair follicle.
This sac has a nerve supply (which is why it hurts to pull out a hair), oil-producing glands that lubricate the hair and a tiny muscle that makes your hair stand up when it’s cold.
At the follicle’s base is the hair bulb, which contains the all-important hair papilla that supplies blood to the follicle.
Matrix cells near the papilla divide to produce new hair cells, which then harden and form the hair shaft. As the new hair cells are made, the hair is pushed up above the skin and the hair grows.
But the papilla also plays an integral part in regulating hair growth cycles, as it sends signals to the stem cells to move to the base of the follicle and form a hair matrix. Matrix cells then get signals to divide and start a new growth phase.
Unlike nails, our hair grows in cycles
Scientists have identified four phases of hair growth, the:
- anagen or growth phase, which lasts between two and eight years
- catagen or transition phase, when growth slows down, lasting around two weeks
- telogen or resting phase, when there is no growth at all. This usually lasts two to three months
- exogen or shedding phase, when the hair falls out and is replaced by the new hair growing from the same follicle. This starts the process all over again.
Hair follicles enter these phases at different times so we’re not left bald. Mosterpiece/Shutterstock Each follicle goes through this cycle 10–30 times in its lifespan.
If all of our hair follicles grew at the same rate and entered the same phases simultaneously, there would be times when we would all be bald. That doesn’t usually happen: at any given time, only one in ten hairs is in the resting phase.
While we lose about 100–150 hairs daily, the average person has 100,000 hairs on their head, so we barely notice this natural shedding.
So what affects the speed of growth?
Genetics is the most significant factor. While hair growth rates vary between individuals, they tend to be consistent among family members.
Nails are also influenced by genetics, as siblings, especially identical twins, tend to have similar nail growth rates.
Genetics have the biggest impact on growth speed. Cottonbro Studio/Pexels But there are also other influences.
Age makes a difference to hair and nail growth, even in healthy people. Younger people generally have faster growth rates because of the slowing metabolism and cell division that comes with ageing.
Hormonal changes can have an impact. Pregnancy often accelerates hair and nail growth rates, while menopause and high levels of the stress hormone cortisol can slow growth rates.
Nutrition also changes hair and nail strength and growth rate. While hair and nails are made mostly of keratin, they also contain water, fats and various minerals. As hair and nails keep growing, these minerals need to be replaced.
That’s why a balanced diet that includes sufficient nutrients to support your hair and nails is essential for maintaining their health.
Nutrition can impact hair and nail growth. Cottonbro Studio/Pexels Nutrient deficiencies may contribute to hair loss and nail breakage by disrupting their growth cycle or weakening their structure. Iron and zinc deficiencies, for example, have both been linked to hair loss and brittle nails.
This may explain why thick hair and strong, well-groomed nails have long been associated with perception of good health and high status.
However, not all perceptions are true.
No, hair and nails don’t grow after death
A persistent myth that may relate to the legends of vampires is that hair and nails continue to grow after we die.
In reality, they only appear to do so. As the body dehydrates after death, the skin shrinks, making hair and nails seem longer.
Morticians are well aware of this phenomenon and some inject tissue filler into the deceased’s fingertips to minimise this effect.
So, it seems that living or dead, there is no escape from the never-ending task of caring for our hair and nails.
Michelle Moscova, Adjunct Associate Professor, Anatomy, UNSW Sydney
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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Amid Wildfire Trauma, L.A. County Dispatches Mental Health Workers to Evacuees
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PASADENA, Calif. — As Fernando Ramirez drove to work the day after the Eaton Fire erupted, smoke darkened the sky, ash and embers rained onto his windshield, and the air smelled of melting rubber and plastic.
He pulled to the side of the road and cried at the sight of residents trying to save their homes.
“I could see people standing on the roof, watering it, trying to protect it from the fire, and they just looked so hopeless,” said Ramirez, a community outreach worker with the Pasadena Public Health Department.
That evening, the 49-year-old volunteered for a 14-hour shift at the city’s evacuation center, as did colleagues who had also been activated for emergency medical duty. Running on adrenaline and little sleep after finding shelter for homeless people all day, Ramirez spent the night circulating among more than a thousand evacuees, offering wellness checks, companionship, and hope to those who looked distressed.
Local health departments, such as Ramirez’s, have become a key part of governments’ response to wildfires, floods, and other extreme weather events, which scientists say are becoming more intense and frequent due to climate change. The emotional toll of fleeing and possibly losing a home can help cause or exacerbate mental health conditions such as anxiety, depression, post-traumatic stress disorder, suicidal ideation, and substance use, according to health and climate experts.
Wildfires have become a recurring experience for many Angelenos, making it difficult for people to feel safe in their home or able to go about daily living, said Lisa Wong, director of the Los Angeles County Department of Mental Health. However, with each extreme weather event, the county has improved its support for evacuees, she said.
For instance, Wong said the county deployed a team of mental health workers trained to comfort evacuees without retraumatizing them, including by avoiding asking questions likely to bring up painful memories. The department has also learned to better track people’s health needs and redirect those who may find massive evacuation settings uncomfortable to other shelters or interim housing, Wong said. In those first days, the biggest goal is often to reduce people’s anxiety by providing them with information.
“We’ve learned that right when a crisis happens, people don’t necessarily want to talk about mental health,” said Wong, who staffed the evacuation site Jan. 8 with nine colleagues.
Instead, she and her team deliver a message of support: “This is really bad right now, but you’re not going to do this alone. We have a whole system set up for recovery too. Once you get past the initial shock of what happened — initial housing needs, medication needs, all those things — then there’s this whole pathway to recovery that we set up.”
The convention center in downtown Pasadena, which normally hosts home shows, comic cons, and trade shows, was transformed into an evacuation site with hundreds of cots. It was one of at least 13 shelters opened to serve more than 200,000 residents under evacuation orders.
The January wildfires have burned an estimated 64 square miles — an area larger than the city of Paris — and destroyed at least 12,300 buildings since they started Jan. 7. AccuWeather estimates the region will likely face more than $250 billion in economic losses from the blazes, surpassing the estimates from the state’s record-breaking 2020 wildfire season.
Lisa Patel, executive director of the Medical Society Consortium on Climate and Health, said she’s most concerned about low-income residents, who are less likely to access mental health support.
“There was a mental health crisis even before the pandemic,” said Patel, who is also a clinical associate professor of pediatrics at Stanford School of Medicine, referring to the covid-19 pandemic. “The pandemic made it worse. Now you lace in all of this climate change and these disasters into a health care system that isn’t set up to care for the people that already have mental health illness.”
Early research suggests exposure to large amounts of wildfire smoke can damage the brain and increase the risk of developing anxiety, she added.
At the Pasadena Convention Center, Elaine Santiago sat on a cot in a hallway as volunteers pulled wagons loaded with soup, sandwiches, bottled water, and other necessities.
Santiago said she drew comfort from being at the Pasadena evacuation center, knowing that she wasn’t alone in the tragedy.
“It sort of gives me a sense of peace at times,” Santiago said. “Maybe that’s weird. We’re all experiencing this together.”
She had been celebrating her 78th birthday with family when she fled her home in the small city of Sierra Madre, east of Pasadena. As she watched flames whip around her neighborhood, she, along with children and grandkids, scrambled to secure their dogs in crates and grabbed important documents before they left.
The widower had leaned on her husband in past emergencies, and now she felt lost.
“I did feel helpless,” Santiago said. “I figured I’m the head of the household; I should know what to do. But I didn’t know.”
Donny McCullough, who sat on a neighboring green cot draped in a Red Cross blanket, had fled his Pasadena home with his family early on the morning of Jan. 8. Without power at home, the 68-year-old stayed up listening for updates on a battery-powered radio. His eyes remained red from smoke irritation hours later.
“I had my wife and two daughters, and I was trying not to show fear, so I quietly, inside, was like, ‘Oh my God,’” said McCullough, a music producer and writer. “I’m driving away, looking at the house, wondering if it’s going to be the last time I’m going to see it.”
He saved his master recording from a seven-year music project, but he left behind his studio with all his other work from a four-decade career in music.
Not all evacuees arrived with family. Some came searching for loved ones. That’s one of the hardest parts of his shift, Ramirez said. The community outreach worker helped walk people around the building, cot by cot.
A week in, at least two dozen people had been killed in the wildfires.
The work takes a toll on disaster relief workers too. Ramirez said many feared losing their homes in the fires and some already had. He attends therapy weekly, which he said helps him manage his emotions.
At the evacuation center, Ramirez described being on autopilot.
“Some of us react differently. I tend to go into fight mode,” Ramirez said. “I react. I run towards the fire. I run towards personal service. Then once that passes, that’s when my trauma catches up with me.”
Need help? Los Angeles County residents in need of support can call the county’s mental health helpline at 1-800-854-7771. The national Suicide & Crisis Lifeline, 988, is also available for those who’d like to speak with someone confidentially, free of charge.
This article was produced by KFF Health News, which publishes California Healthline, an editorially independent service of the California Health Care Foundation.
KFF Health News is a national newsroom that produces in-depth journalism about health issues and is one of the core operating programs at KFF—an independent source of health policy research, polling, and journalism. Learn more about KFF.
Subscribe to KFF Health News’ free Morning Briefing.
This article first appeared on KFF Health News and is republished here under a Creative Commons license.
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Heart Healthy Diet Plan – by Stephen William
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We’ve covered heart-healthy cooking books before, but variety is good, and boredom is an enemy of health, so let’s shake it up with a fresh stack of recipes!
After a brief overview of the relevant science (which if you’re a regular 10almonds reader, probably won’t be new to you), the author takes the reader on a 28-day journey. Yes, we know the subtitle says 30 days, but unless they carefully hid the other two days somewhere we didn’t find, there are “only” 28 inside. Perhaps the publisher heard it was a month and took creative license. Or maybe there’s a different edition. Either way…
Rather than merely giving a diet plan (though yes, he also does that), he gives a wide range of “spotlight ingredients”, such that many of the recipes, while great in and of themselves, can also be jumping-off points for those of us who like to take recipes and immediately do our own things to them.
Each day gets a breakfast, lunch, dinner, and he also covers drinks, desserts, and such like.
Notwithstanding the cover art being a lot of plants, the recipes are not entirely plant-based; there are a selection of fish dishes (and other seafood, e.g. shrimp) and also some dairy products (e.g. Greek yoghurt). The recipes are certainly very “plant-forward” though and many are just plants. If you’re a strict vegan though, this probably isn’t the book for you.
Bottom line: if you’d like to cook heart-healthy but are often stuck wondering “aaah, what to cook again today?”, then this is the book to get you out of any culinary creative block!
Click here to check out the Heart Healthy Diet Plan, and widen your heart-healthy repertoire!
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Is It Dementia?
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Spot The Signs (Because None Of Us Are Immune)
Dementia affects increasingly many people, and unlike a lot of diseases, it disproportionately affects people in wealthy industrialized nations.
There are two main reasons for this:
- Longevity (in poorer countries, more people die of other things sooner; can’t get age-related cognitive decline if you don’t age)
- Lifestyle (in the age of convenience, it has never been easier to live an unhealthy lifestyle)
The former is obviously no bad thing for those of us lucky enough to be in wealthier countries (though even in such places, good healthcare access is of course sadly not a given for all).
The latter, however, is less systemic and more epidemic. But it does cut both ways:
- An unhealthy lifestyle is much easier here, yes
- A healthier lifestyle is much easier here, too!
This then comes down to two factors in turn:
- Information: knowing about dementia, what things lead to it, what to look out for, what to do
- Motivation: priorities, and how much attention we choose to give this matter
So, let’s get some information, and then give it our attention!
More than just memory
It’s easy to focus on memory loss, but the four key disabilities directly caused by dementia (each person may not get all four), can be remembered by the mnemonic: “AAAA!”
No, somebody didn’t just murder your writer. It’s:
- Amnesia: memory loss, in one or more of its many forms
- e.g. short term memory loss, and/or inability to make new memories
- Aphasia: loss of ability to express oneself, and/or understand what is expressed
- e.g. “More people have been to Berlin than I have”
- Or even less communication-friendly, Broca’s (Expressive) Aphasia and Wernicke’s (Receptive) Aphasia
- Apraxia: loss of ability to do things, through no obvious physical disability
- e.g. staring at the bathroom mirror wondering how to brush one’s teeth
- Agnosia: loss of ability to recognize things
- e.g. prosopagnosia, also called face-blindness.
If any of those seem worryingly familiar, be aware that while yes, it could be a red flag, what’s most important is patterns of these things.
Another difference between having a momentary brainlapse and having dementia might be, for example, the difference between forgetting your keys, and forgetting what keys do or how to use one.
That said, some are neurological deficits that may show up quite unrelated to dementia, including most of those given as examples above. So if you have just one, then that’s probably worthy of note, but probably not dementia.
Writer’s anecdote: I have had prosopagnosia all my life. To give an example of what that is like and how it’s rather more than just “bad with faces”…
Recently I saw my neighbor, and I could tell something was wrong with her face, but I couldn’t put my finger on what it was. Then some moments later, I realized I had mistaken her hat for her face. It was a large beanie with a panda design on it, and that was facelike enough for me to find myself looking at the wrong face.
Subjective memory matters as much as objective
Objective memory tests are great indicators of potential cognitive decline (or improvement!), but even a subjective idea of having memory problems, that one’s memory is “not as good as it used to be”, can be an important indicator too:
Subjective memory may be marker for cognitive decline
And more recently:
If your memory feels like it’s not what it once was, it could point to a future dementia risk
If you’d like an objective test of memory and other cognitive impairments, here’s the industry’s gold standard test (it’s free):
SAGE: A Test to Detect Signs of Alzheimer’s and Dementia
(The Self-Administered Gerocognitive Exam (SAGE) is designed to detect early signs of cognitive, memory or thinking impairments)
There are things that can look like dementia that aren’t
A person with dementia may be unable to recognize their partner, but hey, this writer knows that feeling very well too. So what sets things apart?
More than we have room for today, but here’s a good overview:
What are the early signs of dementia, and how does it differ from normal aging?
Want to read more?
You might like our previous article more specifically about reducing Alzheimer’s risk:
Reducing Alzheimer’s Risk Early!
Take care!
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Immunity – by Dr. William Paul
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This book gives a very person-centric (i.e., focuses on the contributions of named individuals) overview of advances in the field of immunology—up to its publication date in 2015. So, it’s not cutting edge, but it is very good at laying the groundwork for understanding more recent advances that occur as time goes by. After all, immunology is a field that never stands still.
We get a good grounding in how our immune system works (and how it doesn’t), the constant arms race between pathogens and immune responses, and the complexities of autoimmune disorders and—which is functionally in an overlapping category of disease—cancer. And, what advances we can expect soon to address those things.
Given the book was published 8 years ago, how did it measure up? Did we get those advances? Well, for the mostpart yes, we have! Some are still works in progress. But, we’ve also had obvious extra immunological threats in years since, which have also resulted in other advances along the way!
If the book has a downside, it’s that sometimes the author can be a little too person-centric. It’s engaging to focus on human characters, and helps us bring information to life; name-dropping to excess, along with awards won, can sometimes feel a little like the book was co-authored by Tahani Al-Jamil.
Nevertheless, it certainly does keep the book from getting too dry!
Bottom line: this book is a great overview of immunology and immunological research, for anyone who wants to understand these things better.
Click here to check out Immunity, and boost your knowledge of yours!
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