Heal & Reenergize Your Brain With Optimized Sleep Cycles

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Sometimes 8 hours sleep can result in grogginess while 6 hours can result in waking up fresh as a daisy, so what gives? Dr. Tracey Marks explains, in this short video.

Getting more than Zs in

Sleep involves 90-minute cycles, usually in 4 stages:

  1. Stage 1: (drowsy state): brief muscle jerks; lasts a few minutes.
  2. Stage 2: (light sleep): sleep spindles for memory consolidation; 50% of total sleep.
  3. Stage 3 (deep sleep): tissue repair, immune support, brain toxin removal via the glymphatic system.
  4. Stage 4 (REM sleep): emotional processing, creativity, problem-solving, and dreaming.

Some things can disrupt some or all of those. To give a few common examples:

  • Alcohol: impairs REM sleep.
  • Caffeine: hinders deep sleep even if consumed hours before bed.
  • Screentime: delays sleep onset due to blue light (but not by much); the greater problem is that it can also disrupt REM sleep due to mental stimulation.

To optimize things, Dr. Marks recommends:

  • 90-minute rule: plan sleep to align with full cycles (e.g: 22:30 to 06:00 = 7½ hours, which is 5x 90-minute cycles).
  • Smart alarms: use sleep-tracking apps with built-in alarm, to wake you up during light sleep phases.
  • Strategic naps: keep naps to 20 minutes or a full 90-minute cycle.
  • Pink noise: improves deep sleep.
  • Meal timing: avoid eating within 3 hours of bedtime.
  • Natural light: get morning light exposure in the morning to strengthen circadian rhythm.

For more on all of this, enjoy:

Click Here If The Embedded Video Doesn’t Load Automatically!

Want to learn more?

You might also like to read:

Calculate (And Enjoy) The Perfect Night’s Sleep

Take care!

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  • Fluoride Toothpaste vs Non-Fluoride Toothpaste – Which is Healthier?

    10almonds is reader-supported. We may, at no cost to you, receive a portion of sales if you purchase a product through a link in this article.

    Our Verdict

    When comparing fluoride toothpaste to non-fluoride toothpaste, we picked the fluoride.

    Why?

    Fluoride is indeed toxic; that’s why it’s in toothpaste (to kill things; namely, bacteria whose waste products would harm our teeth). However, we are much bigger than those bacteria.

    Given the amount of fluoride in toothpaste (usually under 1mg per strip of toothpaste to cover a toothbrush head), the amount that people swallow unintentionally (about 1/20th of that, so about 0.1mg daily if brushing teeth twice daily), and the toxicity level of fluoride (32–64mg/kg), then even if we take the most dangerous ends of all those numbers (and an average body size), to suffer ill effects from fluoride due to brushing your teeth, would require that you brush your teeth more than 23,000 times per day.

    Alternatively, if you were to ravenously eat the toothpaste instead of spitting it out, you’d only need to brush your teeth a little over 1,000 times per day.

    All the same, please don’t eat toothpaste; that’s not the message here.

    However! In head-to-head tests, fluoride toothpaste has almost always beaten non-fluoride toothpaste.

    Almost? Yes, almost: hydroxyapatite performed equally in one study, but that’s not usually an option on as many supermarket shelves.

    We found some on Amazon, though, which is the one we used for today’s head-to-head. Here it is:

    Boka Fluoride-Free Toothpaste

    However, before you rush to buy it, do be aware that the toxicity of hydroxyapatite appears to be about twice that of fluoride:

    Scientific Committee on Consumer Safety Opinion On Hydroxyapatite (Nano)

    …which is still very safe (you’d need to brush your teeth, and eat all the toothpaste, about 500 times per day, to get to toxic levels, if we run with the same numbers we discussed before. Again, please do not do that, though).

    But, since the science so far suggests it’s about twice as toxic as fluoride, then regardless of that still being very safe, the fluoride is obviously (by the same metric) twice as safe, hence picking the fluoride.

    Want more options?

    Check out our previous main feature:

    Less Common Oral Hygiene Options

    (the above article also links back to our discussion of different toothpastes and mouthwashes, by the way)

    Take care!

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  • Behaving During the Holidays

    10almonds is reader-supported. We may, at no cost to you, receive a portion of sales if you purchase a product through a link in this article.

    It’s Q&A Day at 10almonds!

    Have a question or a request? You can always hit “reply” to any of our emails, or use the feedback widget at the bottom!

    In cases where we’ve already covered something, we might link to what we wrote before, but will always be happy to revisit any of our topics again in the future too—there’s always more to say!

    As ever: if the question/request can be answered briefly, we’ll do it here in our Q&A Thursday edition. If not, we’ll make a main feature of it shortly afterwards!

    So, no question/request too big or small

    ❝It’s hard to “behave” when it comes to holiday indulging…I’m on a low sodium, sugar restricted regimen from my doctor. Trying to get interested in bell peppers as a snack…wish me luck!❞

    Good luck! Other low sodium, low sugar snacks include:

    • Nuts! Unsalted, of course. We’re biased towards almonds 😉
    • Air-popped popcorn (you can season it, just not with salt/sugar!)
    • Fruit (but not fruit juice; it has to be in solid form)
    • Peas (not a classic snack food, we know, but they can be enjoyed many ways)
      • Seriously, try them frozen or raw! Frozen/raw peas are a great sweet snack.
      • Chickpeas are great dried/roasted, by the way, and give much of the same pleasure as a salty snack without being salty! Obviously, this means cooking them without salt, but that’s fine, or if using tinned, choose “in water” rather than “in brine”
    • Hummus is also a great healthy snack (check the ingredients for salt if not making it yourself, though) and can be enjoyed as a dip using raw vegetables (celery, carrot sticks, cruciferous vegetables, whatever you prefer)

    Enjoy!

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  • Longevity for the Lazy – by Dr. Richard Malish

    10almonds is reader-supported. We may, at no cost to you, receive a portion of sales if you purchase a product through a link in this article.

    There are some people who devote all their resources to longevity, which can become a full-time occupation, not to mention a very expensive endeavor. This book’s for those who want to get the best possible “bang for buck” by doing the things that have the most favorable cost:worth ratio.

    Dr. Malish covers what can be done easily for personal longevity, as well as what technological advances can be enjoyed that those before us didn’t have as options. He also discusses the diseases that are most likely to kill us, and how to avoid those.

    He preaches a proactive approach, but one that is simple and consistent and based in good science, and good statistics. Indeed, while he’s served 20 years as an army doctor and a cardiologist, he now works as a healthcare policy consultant, so he is well-placed to advise.

    The style of the book is halfway between regular pop-science and a textbook; you can either read it cover-to-cover, or skim first though the key points, highlight boxes, summaries, and the like. He also provides a time-phased task list, for those who like things to be laid out like that.

    Bottom line: this is a very good, methodical guide to living longer without making it a full-time occupation.

    Click here to check out Longevity For The Lazy, and enjoy healthy longevity that gives you time free to enjoy it!

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  • The Hidden Risk of Stretching: Avoiding Hamstring Injuries in Yoga

    10almonds is reader-supported. We may, at no cost to you, receive a portion of sales if you purchase a product through a link in this article.

    What is Yoga Butt

    Have you ever experienced a mysterious pain while stretching, or perhaps during yoga? You might be dealing with “yoga butt,” a common—although rarely discussed—injury. In the below video, the Lovely Liv from Livinleggings shares her journey of discovering, and overcoming, “yoga butt”.

    Dealing With Yoga Butt

    Yoga butt, or proximal hamstring tendinopathy, occurs when the hamstrings are overstretched without adequate strengthening. Many yoga poses help stretch the hamstrings, but often don’t focus on strengthening said hamstrings; this imbalance is what can lead to damage over time.

    To help prevent Yoga butt, it’s essential to balance stretching with strengthening. You can look into incorporating hamstring-strengthening exercises like Romanian deadlifts, hamstring curls, and modified yoga poses into your routine.

    (If you’re new to strengthening exercises, we recommend reading Women’s Strength Training Anatomy Workouts or Strength Training for Seniors).

    Watch the full video to learn more and hopefully protect yourself from long-term injuries:

    Let us know your thoughts, and whether you have any other topics you’d like us to cover.

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  • Escape From The Clutches Of Shame

    10almonds is reader-supported. We may, at no cost to you, receive a portion of sales if you purchase a product through a link in this article.

    We’ve written before about managing various emotions, including “negative” ones. We put that in “scare quotes” because they also all have positive aspects, that are just generally overshadowed by the fact that the emotions themselves are not pleasant. But for example…

    We evolved our emotions, including the “negative” ones, for our own benefit as a species:

    • Stress keeps us safe by making sure we take important situations seriously
    • Anger keeps us safe by protecting us from threats
    • Disgust keeps us safe by helping us to avoid things that might cause disease
    • Anxiety keeps us safe by ensuring we don’t get complacent
    • Guilt keeps us safe by ensuring we can function as a community
    • Sadness keeps us safe by ensuring we value things that are important to us, and learn to become averse to losing them
    • …and so on

    You can read more about how to turn these off (or rather, at least pause them) when they’re misfiring and/or just plain not convenient, here:

    The Off-Button For Your Brain

    While it’s generally considered good to process feelings instead of putting them aside, the fact is that sometimes we have to hold it together while we do something, such that we can later have an emotional breakdown at a convenient time and place, instead of the supermarket or bank or office or airport or while entertaining houseguests or… etc.

    Today, though, we’re not putting things aside, for the most part (though we will get to that too).

    We’ll be dealing with shame, which is closely linked to the guilt we mentioned in that list there.

    See also: Reconsidering the Differences Between Shame and Guilt

    Shame’s purpose

    Shame’s purpose is to help us (as a community) avoid anti-social behavior for which we might be shamed, and thus exiled from the in-group. It helps us all function better together, which is how we thrive as a species.

    Shame, therefore, is often assumed to be something we can (and possibly should) use to ensure that we (ourselves and/or others) “do the right thing”.

    But there’s a catch…

    Shame only works negatively

    You may be thinking “well duh, it’s a negative emotion”, but this isn’t about negativity in the subjective sense, but rather, positive vs negative motivation:

    • Positive motivation: motivation that encourages us to do a given thing
    • Negative motivation: motivation that encourages us to specifically not do a given thing

    Shame is only useful as a negative motivation, i.e., encouraging us to specifically not do a given thing.

    Examples:

    • You cannot (in any way that sticks, at least) shame somebody into doing more housework.
    • You can, however, shame somebody out of drinking and driving.

    This distinction matters a lot when it comes to how we are with our children, or with our employees (or those placed under us in a management structure), or with people who otherwise look to us as leaders.

    It also matters when it comes to how we are with ourselves.

    Here’s a paper about this, by the way, with assorted real-world examples:

    The negative side of motivation: the role of shame

    From those examples, we can see that attempts to shame someone (including oneself) into doing something positive will generally not only fail, they will actively backfire, and people (including oneself) will often perform worse than pre-shaming.

    Looking inwards: healthy vs unhealthy shame

    Alcoholics Anonymous and similar programs use a degree of pro-social shame to help members abstain from the the act being shamed.

    Rather than the unhelpful shame of exiling a person from a group for doing a shameful thing, however, they take an approach of laying out the shame for all to see, feeling the worst of it and moving past it, which many report as being quite freeing emotionally while still [negatively] motivational to not use the substance in question in the future (and similar for activity-based addictions/compulsions, such as gambling, for example).

    As such, if you are trying to avoid doing a thing, shame can be a useful motivator. So by all means, if it’s appropriate to your goals, tell your friends/family about how you are now quitting this or that (be it an addiction, or just something generally unhealthy that you’d like to strike off your regular consumption/activity list).

    You will still be tempted! But the knowledge of the shame you would feel as a result will help keep you from straying into that temptation.

    If you are trying to do a thing, however, (even something thought of in a negative frame, such as “lose weight”), then shame is not helpful and you will do best to set it aside.

    You can shame yourself out of drinking sodas (if that’s your plan), but you can’t shame yourself into eating healthy meals. And even if your plan is just shaming yourself out of eating unhealthy food… Without a clear active positive replacement to focus on instead, all you’ll do there is give yourself an eating disorder. You’ll eat nothing when people are looking, and then either a) also eat next to nothing in private or else b) binge in secret, and feel terrible about yourself, neither of which are any good for you whatsoever.

    Similarly, you can shame yourself out of bed, but you can’t shame yourself into the gym:

    Is there positive in the negative? Understanding the role of guilt and shame in physical activity self-regulation

    Let it go

    There are some cases, especially those where shame has a large crossover with guilt, that it serves no purpose whatsoever, and is best processed and then put aside.

    For example, if you did something that you are ashamed of many years ago, and/or feel guilty about something that you did many years ago, but this is not an ongoing thing for you (i.e., it was a one-off bad decision, or a bad habit that have now long since dropped), then feeling shame and/or guilt about that does not benefit you or anyone else.

    As to how to process it and put it aside, if your thing harmed someone else, you could see if there’s a way to try to make amends (even if without confessing ill, such as by acting anonymously to benefit the person/group you harmed).

    And then, forgive yourself. Regardless of whether you feel like you deserve it. Make the useful choice, that better benefits you, and by extension those around you.

    If you are religious, you may find that of help here too. We’re a health science publication not a theological one, but for example: Buddhism preaches compassion including for oneself. Judaism preaches atonement. Christianity, absolution. For Islam, mercy is one of the holiest ideals of the religion, along with forgiveness. So while religion isn’t everyone’s thing, for those for whom it is, it can be an asset in this regard.

    For a more worldly approach:

    To Err Is Human; To Forgive, Healthy (Here’s How To Do It) ← this goes for when the forgiveness in question is for yourself, too—and we do write about that there (and how)!

    Take care!

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  • Purpose – by Gina Bianchini

    10almonds is reader-supported. We may, at no cost to you, receive a portion of sales if you purchase a product through a link in this article.

    To address the elephant in the room, this is not a rehash of Rick Warren’s best-selling “The Purpose-Driven Life”. Instead, this book is (in this reviewer’s opinion) a lot better. It’s a lot more comprehensive, and it doesn’t assume that what’s most important to the author will be what’s most important to you.

    What’s it about, then? It’s about giving your passion (whatever it may be) the tools to have an enduring impact on the world. It recommends doing this by leveraging a technology that would once have been considered magic: social media.

    Far from “grow your brand” business books, this one looks at what really matters the most to you. Nobody will look back on your life and say “what a profitable second quarter that was in such-a-year”. But if you do your thing well, people will look back and say:

    • “he was a pillar of the community”
    • “she raised that community around her”
    • “they did so much for us”
    • “finding my place in that community changed my life”
    • …and so forth. Isn’t that something worth doing?

    Bianchini takes the position of both “idealistic dreamer” and “realistic worker”.

    Further, she blends the two beautifully, to give practical step-by-step instructions on how to give life to the community that you build.

    Check Out This Amazing Book On Amazon Today!

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