Why are my muscles sore after exercise? Hint: it’s nothing to do with lactic acid

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As many of us hit the gym or go for a run to recover from the silly season, you might notice a bit of extra muscle soreness.

This is especially true if it has been a while between workouts.

A common misunderstanding is that such soreness is due to lactic acid build-up in the muscles.

Research, however, shows lactic acid has nothing to do with it. The truth is far more interesting, but also a bit more complex.

It’s not lactic acid

We’ve known for decades that lactic acid has nothing to do with muscle soreness after exercise.

In fact, as one of us (Robert Andrew Robergs) has long argued, cells produce lactate, not lactic acid. This process actually opposes not causes the build-up of acid in the muscles and bloodstream.

Unfortunately, historical inertia means people still use the term “lactic acid” in relation to exercise.

Lactate doesn’t cause major problems for the muscles you use when you exercise. You’d probably be worse off without it due to other benefits to your working muscles.

Lactate isn’t the reason you’re sore a few days after upping your weights or exercising after a long break.

So, if it’s not lactic acid and it’s not lactate, what is causing all that muscle soreness?

Muscle pain during and after exercise

When you exercise, a lot of chemical reactions occur in your muscle cells. All these chemical reactions accumulate products and by-products which cause water to enter into the cells.

That causes the pressure inside and between muscle cells to increase.

This pressure, combined with the movement of molecules from the muscle cells can stimulate nerve endings and cause discomfort during exercise.

The pain and discomfort you sometimes feel hours to days after an unfamiliar type or amount of exercise has a different list of causes.

If you exercise beyond your usual level or routine, you can cause microscopic damage to your muscles and their connections to tendons.

Such damage causes the release of ions and other molecules from the muscles, causing localised swelling and stimulation of nerve endings.

This is sometimes known as “delayed onset muscle soreness” or DOMS.

While the damage occurs during the exercise, the resulting response to the injury builds over the next one to two days (longer if the damage is severe). This can sometimes cause pain and difficulty with normal movement.

The upshot

Research is clear; the discomfort from delayed onset muscle soreness has nothing to do with lactate or lactic acid.

The good news, though, is that your muscles adapt rapidly to the activity that would initially cause delayed onset muscle soreness.

So, assuming you don’t wait too long (more than roughly two weeks) before being active again, the next time you do the same activity there will be much less damage and discomfort.

If you have an exercise goal (such as doing a particular hike or completing a half-marathon), ensure it is realistic and that you can work up to it by training over several months.

Such training will gradually build the muscle adaptations necessary to prevent delayed onset muscle soreness. And being less wrecked by exercise makes it more enjoyable and more easy to stick to a routine or habit.

Finally, remove “lactic acid” from your exercise vocabulary. Its supposed role in muscle soreness is a myth that’s hung around far too long already.The Conversation

Robert Andrew Robergs, Associate Professor – Exercise Physiology, Queensland University of Technology and Samuel L. Torrens, PhD Candidate, Queensland University of Technology

This article is republished from The Conversation under a Creative Commons license. Read the original article.

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  • Why is cancer called cancer? We need to go back to Greco-Roman times for the answer

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    One of the earliest descriptions of someone with cancer comes from the fourth century BC. Satyrus, tyrant of the city of Heracleia on the Black Sea, developed a cancer between his groin and scrotum. As the cancer spread, Satyrus had ever greater pains. He was unable to sleep and had convulsions.

    Advanced cancers in that part of the body were regarded as inoperable, and there were no drugs strong enough to alleviate the agony. So doctors could do nothing. Eventually, the cancer took Satyrus’ life at the age of 65.

    Cancer was already well known in this period. A text written in the late fifth or early fourth century BC, called Diseases of Women, described how breast cancer develops:

    hard growths form […] out of them hidden cancers develop […] pains shoot up from the patients’ breasts to their throats, and around their shoulder blades […] such patients become thin through their whole body […] breathing decreases, the sense of smell is lost […]

    Other medical works of this period describe different sorts of cancers. A woman from the Greek city of Abdera died from a cancer of the chest; a man with throat cancer survived after his doctor burned away the tumour.

    Where does the word ‘cancer’ come from?

    Galen, the physician
    Why does the word ‘cancer’ have its roots in the ancient Greek and Latin words for crab? The physician Galen offers one explanation. Pierre Roche Vigneron/Wikimedia

    The word cancer comes from the same era. In the late fifth and early fourth century BC, doctors were using the word karkinos – the ancient Greek word for crab – to describe malignant tumours. Later, when Latin-speaking doctors described the same disease, they used the Latin word for crab: cancer. So, the name stuck.

    Even in ancient times, people wondered why doctors named the disease after an animal. One explanation was the crab is an aggressive animal, just as cancer can be an aggressive disease; another explanation was the crab can grip one part of a person’s body with its claws and be difficult to remove, just as cancer can be difficult to remove once it has developed. Others thought it was because of the appearance of the tumour.

    The physician Galen (129-216 AD) described breast cancer in his work A Method of Medicine to Glaucon, and compared the form of the tumour to the form of a crab:

    We have often seen in the breasts a tumour exactly like a crab. Just as that animal has feet on either side of its body, so too in this disease the veins of the unnatural swelling are stretched out on either side, creating a form similar to a crab.

    Not everyone agreed what caused cancer

    Bust of physician Erasistratus
    The physician Erasistratus didn’t think black bile was to blame. Didier Descouens/Musée Ingres-Bourdelle/Wikimedia, CC BY-SA

    In the Greco-Roman period, there were different opinions about the cause of cancer.

    According to a widespread ancient medical theory, the body has four humours: blood, yellow bile, phlegm and black bile. These four humours need to be kept in a state of balance, otherwise a person becomes sick. If a person suffered from an excess of black bile, it was thought this would eventually lead to cancer.

    The physician Erasistratus, who lived from around 315 to 240 BC, disagreed. However, so far as we know, he did not offer an alternative explanation.

    How was cancer treated?

    Cancer was treated in a range of different ways. It was thought that cancers in their early stages could be cured using medications.

    These included drugs derived from plants (such as cucumber, narcissus bulb, castor bean, bitter vetch, cabbage); animals (such as the ash of a crab); and metals (such as arsenic).

    Galen claimed that by using this sort of medication, and repeatedly purging his patients with emetics or enemas, he was sometimes successful at making emerging cancers disappear. He said the same treatment sometimes prevented more advanced cancers from continuing to grow. However, he also said surgery is necessary if these medications do not work.

    Surgery was usually avoided as patients tended to die from blood loss. The most successful operations were on cancers of the tip of the breast. Leonidas, a physician who lived in the second and third century AD, described his method, which involved cauterising (burning):

    I usually operate in cases where the tumours do not extend into the chest […] When the patient has been placed on her back, I incise the healthy area of the breast above the tumour and then cauterize the incision until scabs form and the bleeding is stanched. Then I incise again, marking out the area as I cut deeply into the breast, and again I cauterize. I do this [incising and cauterizing] quite often […] This way the bleeding is not dangerous. After the excision is complete I again cauterize the entire area until it is dessicated.

    Cancer was generally regarded as an incurable disease, and so it was feared. Some people with cancer, such as the poet Silius Italicus (26-102 AD), died by suicide to end the torment.

    Patients would also pray to the gods for hope of a cure. An example of this is Innocentia, an aristocratic lady who lived in Carthage (in modern-day Tunisia) in the fifth century AD. She told her doctor divine intervention had cured her breast cancer, though her doctor did not believe her.

    Ancient city of Carthage
    Innocentia from Carthage, in modern-day Tunisia, believed divine intervention cured her breast cancer. Valery Bareta/Shutterstock

    From the past into the future

    We began with Satyrus, a tyrant in the fourth century BC. In the 2,400 years or so since then, much has changed in our knowledge of what causes cancer, how to prevent it and how to treat it. We also know there are more than 200 different types of cancer. Some people’s cancers are so successfully managed, they go on to live long lives.

    But there is still no general “cure for cancer”, a disease that about one in five people develop in their lifetime. In 2022 alone, there were about 20 million new cancer cases and 9.7 million cancer deaths globally. We clearly have a long way to go.

    Konstantine Panegyres, McKenzie Postdoctoral Fellow, Historical and Philosophical Studies, The University of Melbourne

    This article is republished from The Conversation under a Creative Commons license. Read the original article.

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  • 4 Ways Vaccine Skeptics Mislead You on Measles and More

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    Measles is on the rise in the United States. In the first quarter of this year, the number of cases was about 17 times what it was, on average, during the same period in each of the four years before, according to the Centers for Disease Control and Prevention. Half of the people infected — mainly children — have been hospitalized.

    It’s going to get worse, largely because a growing number of parents are deciding not to get their children vaccinated against measles as well as diseases like polio and pertussis. Unvaccinated people, or those whose immunization status is unknown, account for 80% of the measles cases this year. Many parents have been influenced by a flood of misinformation spouted by politicians, podcast hosts, and influential figures on television and social media. These personalities repeat decades-old notions that erode confidence in the established science backing routine childhood vaccines. KFF Health News examined the rhetoric and explains why it’s misguided:

    The No-Big-Deal Trope

    A common distortion is that vaccines aren’t necessary because the diseases they prevent are not very dangerous, or too rare to be of concern. Cynics accuse public health officials and the media of fear-mongering about measles even as 19 states report cases.

    For example, an article posted on the website of the National Vaccine Information Center — a regular source of vaccine misinformation — argued that a resurgence in concern about the disease “is ‘sky is falling’ hype.” It went on to call measles, mumps, chicken pox, and influenza “politically incorrect to get.”

    Measles kills roughly 2 of every 1,000 children infected, according to the CDC. If that seems like a bearable risk, it’s worth pointing out that a far larger portion of children with measles will require hospitalization for pneumonia and other serious complications. For every 10 measles cases, one child with the disease develops an ear infection that can lead to permanent hearing loss. Another strange effect is that the measles virus can destroy a person’s existing immunity, meaning they’ll have a harder time recovering from influenza and other common ailments.

    Measles vaccines have averted the deaths of about 94 million people, mainly children, over the past 50 years, according to an April analysis led by the World Health Organization. Together with immunizations against polio and other diseases, vaccines have saved an estimated 154 million lives globally.

    Some skeptics argue that vaccine-preventable diseases are no longer a threat because they’ve become relatively rare in the U.S. (True — due to vaccination.) This reasoning led Florida’s surgeon general, Joseph Ladapo, to tell parents that they could send their unvaccinated children to school amid a measles outbreak in February. “You look at the headlines and you’d think the sky was falling,” Ladapo said on a News Nation newscast. “There’s a lot of immunity.”

    As this lax attitude persuades parents to decline vaccination, the protective group immunity will drop, and outbreaks will grow larger and faster. A rapid measles outbreak hit an undervaccinated population in Samoa in 2019, killing 83 people within four months. A chronic lack of measles vaccination in the Democratic Republic of the Congo led to more than 5,600 people dying from the disease in massive outbreaks last year.

    The ‘You Never Know’ Trope

    Since the earliest days of vaccines, a contingent of the public has considered them bad because they’re unnatural, as compared with nature’s bounty of infections and plagues. “Bad” has been redefined over the decades. In the 1800s, vaccine skeptics claimed that smallpox vaccines caused people to sprout horns and behave like beasts. More recently, they blame vaccines for ailments ranging from attention-deficit/hyperactivity disorder to autism to immune system disruption. Studies don’t back the assertions. However, skeptics argue that their claims remain valid because vaccines haven’t been adequately tested.

    In fact, vaccines are among the most studied medical interventions. Over the past century, massive studies and clinical trials have tested vaccines during their development and after their widespread use. More than 12,000 people took part in clinical trials of the most recent vaccine approved to prevent measles, mumps, and rubella. Such large numbers allow researchers to detect rare risks, which are a major concern because vaccines are given to millions of healthy people.

    To assess long-term risks, researchers sift through reams of data for signals of harm. For example, a Danish group analyzed a database of more than 657,000 children and found that those who had been vaccinated against measles as babies were no more likely to later be diagnosed with autism than those who were not vaccinated. In another study, researchers analyzed records from 805,000 children born from 1990 through 2001 and found no evidence to back a concern that multiple vaccinations might impair children’s immune systems.

    Nonetheless, people who push vaccine misinformation, like candidate Robert F. Kennedy Jr., dismiss massive, scientifically vetted studies. For example, Kennedy argues that clinical trials of new vaccines are unreliable because vaccinated kids aren’t compared with a placebo group that gets saline solution or another substance with no effect. Instead, many modern trials compare updated vaccines with older ones. That’s because it’s unethical to endanger children by giving them a sham vaccine when the protective effect of immunization is known. In a 1950s clinical trial of polio vaccines, 16 children in the placebo group died of polio and 34 were paralyzed, said Paul Offit, director of the Vaccine Education Center at Children’s Hospital of Philadelphia and author of a book on the first polio vaccine.

    The Too-Much-Too-Soon Trope

    Several bestselling vaccine books on Amazon promote the risky idea that parents should skip or delay their children’s vaccines. “All vaccines on the CDC’s schedule may not be right for all children at all times,” writes Paul Thomas in his bestselling book “The Vaccine-Friendly Plan.” He backs up this conviction by saying that children who have followed “my protocol are among the healthiest in the world.”

    Since the book was published, Thomas’ medical license was temporarily suspended in Oregon and Washington. The Oregon Medical Board documented how Thomas persuaded parents to skip vaccines recommended by the CDC, and reported that he “reduced to tears” a mother who disagreed.  Several children in his care came down with pertussis and rotavirus, diseases easily prevented by vaccines, wrote the board. Thomas recommended fish oil supplements and homeopathy to an unvaccinated child with a deep scalp laceration, rather than an emergency tetanus vaccine. The boy developed severe tetanus, landing in the hospital for nearly two months, where he required intubation, a tracheotomy, and a feeding tube to survive.

    The vaccination schedule recommended by the CDC has been tailored to protect children at their most vulnerable points in life and minimize side effects. The combination measles, mumps, and rubella vaccine isn’t given for the first year of a baby’s life because antibodies temporarily passed on from their mother can interfere with the immune response. And because some babies don’t generate a strong response to that first dose, the CDC recommends a second one around the time a child enters kindergarten because measles and other viruses spread rapidly in group settings.

    Delaying MMR doses much longer may be unwise because data suggests that children vaccinated at 10 or older have a higher chance of adverse reactions, such as a seizure or fatigue.

    Around a dozen other vaccines have discrete timelines, with overlapping windows for the best response. Studies have shown that MMR vaccines may be given safely and effectively in combination with other vaccines.

    ’They Don’t Want You to Know’ Trope

    Kennedy compares the Florida surgeon general to Galileo in the introduction to Ladapo’s new book on transcending fear in public health. Just as the Roman Catholic inquisition punished the renowned astronomer for promoting theories about the universe, Kennedy suggests that scientific institutions oppress dissenting voices on vaccines for nefarious reasons.

    “The persecution of scientists and doctors who dare to challenge contemporary orthodoxies is not a new phenomenon,” Kennedy writes. His running mate, lawyer Nicole Shanahan, has campaigned on the idea that conversations about vaccine harms are censored and the CDC and other federal agencies hide data due to corporate influence.

    Claims like “they don’t want you to know” aren’t new among the anti-vaccine set, even though the movement has long had an outsize voice. The most listened-to podcast in the U.S., “The Joe Rogan Experience,” regularly features guests who cast doubt on scientific consensus. Last year on the show, Kennedy repeated the debunked claim that vaccines cause autism.

    Far from ignoring that concern, epidemiologists have taken it seriously. They have conducted more than a dozen studies searching for a link between vaccines and autism, and repeatedly found none. “We have conclusively disproven the theory that vaccines are connected to autism,” said Gideon Meyerowitz-Katz, an epidemiologist at the University of Wollongong in Australia. “So, the public health establishment tends to shut those conversations down quickly.”

    Federal agencies are transparent about seizures, arm pain, and other reactions that vaccines can cause. And the government has a program to compensate individuals whose injuries are scientifically determined to result from them. Around 1 to 3.5 out of every million doses of the measles, mumps, and rubella vaccine can cause a life-threatening allergic reaction; a person’s lifetime risk of death by lightning is estimated to be as much as four times as high.

    “The most convincing thing I can say is that my daughter has all her vaccines and that every pediatrician and public health person I know has vaccinated their kids,” Meyerowitz-Katz said. “No one would do that if they thought there were serious risks.”

    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.

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  • Neuroaffirming care values the strengths and differences of autistic people, those with ADHD or other profiles. Here’s how

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    We’ve come a long way in terms of understanding that everyone thinks, interacts and experiences the world differently. In the past, autistic people, people with attention deficit hyperactive disorder (ADHD) and other profiles were categorised by what they struggled with or couldn’t do.

    The concept of neurodiversity, developed by autistic activists in the 1990s, is an emerging area. It promotes the idea that different brains (“neurotypes”) are part of the natural variation of being human – just like “biodiversity” – and they are vital for our survival.

    This idea is now being applied to research and to care. At the heart of the National Autism Strategy, currently in development, is neurodiversity-affirming (neuroaffirming) care and practice. But what does this look like?

    Unsplash

    Reframing differences

    Neurodiversity challenges the traditional medical model of disability, which views neurological differences solely through a lens of deficits and disorders to be treated or cured.

    Instead, it reframes it as a different, and equally valuable, way of experiencing and navigating the world. It emphasises the need for brains that are different from what society considers “neurotypical”, based on averages and expectations. The term “neurodivergent” is applied to Autistic people, those with ADHD, dyslexia and other profiles.

    Neuroaffirming care can take many forms depending on each person’s needs and context. It involves accepting and valuing different ways of thinking, learning and experiencing the world. Rather than trying to “fix” or change neurodivergent people to fit into a narrow idea of what’s considered “normal” or “better”, neuroaffirming care takes a person-centered, strengths-based approach. It aims to empower and support unique needs and strengths.

    girl sits on couch with colourful fidget toy
    Neuroaffirming care can look different in a school or clinical setting. Shutterstock/Inna Reznik

    Adaptation and strengths

    Drawing on the social model of disability, neuroaffirming care acknowledges there is often disability associated with being different, especially in a world not designed for neurodivergent people. This shift focuses away from the person having to adapt towards improving the person-environment fit.

    This can include providing accommodations and adapting environments to make them more accessible. More importantly, it promotes “thriving” through greater participation in society and meaningful activities.

    At school, at work, in clinic

    In educational settings, this might involve using universal design for learning that benefits all learners.

    For example, using systematic synthetic phonics to teach reading and spelling for students with dyslexia can benefit all students. It also could mean incorporating augmentative and alternative communication, such as speech-generating devices, into the classroom.

    Teachers might allow extra time for tasks, or allow stimming (repetitive movements or noises) for self-regulation and breaks when needed.

    In therapy settings, neuroaffirming care may mean a therapist grows their understanding of autistic culture and learns about how positive social identity can impact self-esteem and wellbeing.

    They may make efforts to bridge the gap in communication between different neurotypes, known as the double empathy problem. For example, the therapist may avoid relying on body language or facial expressions (often different in autistic people) to interpret how a client is feeling, instead of listening carefully to what the client says.

    Affirming therapy approaches with children involve “tuning into” their preferred way of communicating, playing and engaging. This can bring meaningful connection rather than compliance to “neurotypical” ways of playing and relating.

    In workplaces, it can involve flexible working arrangements (hours, patterns and locations), allowing different modes of communication (such as written rather than phone calls) and low-sensory workspaces (for example, low-lighting, low-noise office spaces).

    In public spaces, it can look like providing a “sensory space”, such as at large concerts, where neurodivergent people can take a break and self-regulate if needed. And staff can be trained to recognise, better understand and assist with hidden disabilities.

    Combining lived experience and good practice

    Care is neuroaffirmative when it centres “lived experience” in its design and delivery, and positions people with disability as experts.

    As a result of being “different”, people in the neurodivergent community experience high rates of bullying and abuse. So neuroaffirming care should be combined with a trauma-informed approach, which acknowledges the need to understand a person’s life experiences to provide effective care.

    Culturally responsive care acknowledges limited access to support for culturally and racially marginalised Autistic people and higher rates of LGBTQIA+ identification in the neurodivergent community.

    open meeting room with people putting ideas on colourful notes on wall
    In the workplace, we can acknowledge how difference can fuel ideas. Unsplash/Jason Goodman

    Authentic selves

    The draft National Autism Strategy promotes awareness that our population is neurodiverse. It hopes to foster a more inclusive and understanding society.

    It emphasises the societal and public health responsibilities for supporting neurodivergent people via public education, training, policy and legislation. By providing spaces and places where neurodivergent people can be their authentic, unmasked selves, we are laying the foundations for feeling seen, valued, safe and, ultimately, happy and thriving.

    The author would like to acknowledge the assistance of psychologist Victoria Gottliebsen in drafting this article. Victoria is a member of the Oversight Council for the National Autism Strategy.

    Josephine Barbaro, Associate Professor, Principal Research Fellow, Psychologist, La Trobe University

    This article is republished from The Conversation under a Creative Commons license. Read the original article.

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  • Low-Dose Aspirin & Anemia
  • Alzheimer’s may have once spread from person to person, but the risk of that happening today is incredibly low

    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.

    An article published this week in the prestigious journal Nature Medicine documents what is believed to be the first evidence that Alzheimer’s disease can be transmitted from person to person.

    The finding arose from long-term follow up of patients who received human growth hormone (hGH) that was taken from brain tissue of deceased donors.

    Preparations of donated hGH were used in medicine to treat a variety of conditions from 1959 onwards – including in Australia from the mid 60s.

    The practice stopped in 1985 when it was discovered around 200 patients worldwide who had received these donations went on to develop Creuztfeldt-Jakob disease (CJD), which causes a rapidly progressive dementia. This is an otherwise extremely rare condition, affecting roughly one person in a million.

    What’s CJD got to do with Alzehimer’s?

    CJD is caused by prions: infective particles that are neither bacterial or viral, but consist of abnormally folded proteins that can be transmitted from cell to cell.

    Other prion diseases include kuru, a dementia seen in New Guinea tribespeople caused by eating human tissue, scrapie (a disease of sheep) and variant CJD or bovine spongiform encephalopathy, otherwise known as mad cow disease. This raised public health concerns over the eating of beef products in the United Kingdom in the 1980s.

    Human growth hormone used to come from donated organs

    Human growth hormone (hGH) is produced in the brain by the pituitary gland. Treatments were originally prepared from purified human pituitary tissue.

    But because the amount of hGH contained in a single gland is extremely small, any single dose given to any one patient could contain material from around 16,000 donated glands.

    An average course of hGH treatment lasts around four years, so the chances of receiving contaminated material – even for a very rare condition such as CJD – became quite high for such people.

    hGH is now manufactured synthetically in a laboratory, rather than from human tissue. So this particular mode of CJD transmission is no longer a risk.

    Scientist in a lab
    Human growth hormone is now produced in a lab.
    National Cancer Institute/Unsplash

    What are the latest findings about Alzheimer’s disease?

    The Nature Medicine paper provides the first evidence that transmission of Alzheimer’s disease can occur via human-to-human transmission.

    The authors examined the outcomes of people who received donated hGH until 1985. They found five such recipients had developed early-onset Alzheimer’s disease.

    They considered other explanations for the findings but concluded donated hGH was the likely cause.

    Given Alzheimer’s disease is a much more common illness than CJD, the authors presume those who received donated hGH before 1985 may be at higher risk of developing Alzheimer’s disease.

    Alzheimer’s disease is caused by presence of two abnormally folded proteins: amyloid and tau. There is increasing evidence these proteins spread in the brain in a similar way to prion diseases. So the mode of transmission the authors propose is certainly plausible.

    However, given the amyloid protein deposits in the brain at least 20 years before clinical Alzheimer’s disease develops, there is likely to be a considerable time lag before cases that might arise from the receipt of donated hGH become evident.

    When was this process used in Australia?

    In Australia, donated pituitary material was used from 1967 to 1985 to treat people with short stature and infertility.

    More than 2,000 people received such treatment. Four developed CJD, the last case identified in 1991. All four cases were likely linked to a single contaminated batch.

    The risks of any other cases of CJD developing now in pituitary material recipients, so long after the occurrence of the last identified case in Australia, are considered to be incredibly small.

    Early-onset Alzheimer’s disease (defined as occurring before the age of 65) is uncommon, accounting for around 5% of all cases. Below the age of 50 it’s rare and likely to have a genetic contribution.

    Older man places his hands on his head
    Early onset Alzheimer’s means it occurs before age 65.
    perfectlab/Shutterstock

    The risk is very low – and you can’t ‘catch’ it like a virus

    The Nature Medicine paper identified five cases which were diagnosed in people aged 38 to 55. This is more than could be expected by chance, but still very low in comparison to the total number of patients treated worldwide.

    Although the long “incubation period” of Alzheimer’s disease may mean more similar cases may be identified in the future, the absolute risk remains very low. The main scientific interest of the article lies in the fact it’s first to demonstrate that Alzheimer’s disease can be transmitted from person to person in a similar way to prion diseases, rather than in any public health risk.

    The authors were keen to emphasise, as I will, that Alzheimer’s cannot be contracted via contact with or providing care to people with Alzheimer’s disease.The Conversation

    Steve Macfarlane, Head of Clinical Services, Dementia Support Australia, & Associate Professor of Psychiatry, Monash University

    This article is republished from The Conversation under a Creative Commons license. Read the original article.

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  • 100 Things Productive People Do – by Nigel Cumberland

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    This is a book of a hundred small chapters (the book is 396 pages, so 2–3 pages per chapter) which makes for a feeling of quick reading, and definitely gives an option of “light bites”, dipping into the book here and there.

    Cumberland offers a wide range of practical wisdom here, and while the book is (per the title) focused on productivity, it also includes all due weight to not burning out and/or breaking down. Because things productive people do does not, it turns out, include working themselves directly into an early grave.

    But—despite the author’s considerable and obvious starting point of social privilege—nor is this a tome of “offer your genius leadership and otherwise just coast while everyone does your work for you”, either. This is a “brass tacks” book and highly relatable whether your to-do list most prominently features “personally manage the merger of these Fortune 500 companies” or “sort out that junk in the spare room”

    Bottom line: we’d be surprised if this book with 100 pieces of advice failed to bring you enough value to more than pay for itself!

    Pick up your copy of 100 Things Productive People Do from Amazon today!

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  • Things Many People Forget When It Comes To Hydration

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    Good hydration is about more than just “drink lots of water”, and in fact it’s quite possible for a person to drink too much water, and at the same time, be dehydrated. Here’s how and why and what to do about it:

    Water, water, everywhere

    Factors that people forget:

    • Electrolyte balance: without it, we can technically have lots of water while either retaining it (in the case of too high salt levels) or peeing it out (in the case of too low salt levels), neither of which are as helpful as getting it right and actually being able to use the water.
    • Gastrointestinal health: conditions like IBS, Crohn’s, or celiac disease can impair water and nutrient absorption, affecting hydration
    • Genetic factors: some people simply have a predisposition to need more or less water for proper hydration
    • Dietary factors: high salt, caffeine, and alcohol intake (amongst other diuretics) can increase water loss, while water-rich foods (assuming they aren’t also diuretics) increase hydration.

    Strategies to do better:

    • Drink small amounts of water consistently throughout the day rather than large quantities at once—healthy kidneys can process about 1 liter (about 1 quart) of water per hour, so drinking more than that will not help, no matter how dehydrated you are when you start. If your kidneys aren’t in peak health, the amount processable per hour will be lower for you.
    • Increase fiber intake (e.g., fruit and vegetables) to retain water in the intestines and improve hydration
    • Consume water-rich foods (e.g., watermelon, cucumbers, grapes) to enhance overall hydration and support cellular function (the body can use this a lot more efficiently than if you just drink water).
    • Counteract the diuretic effects of caffeine and alcohol by drinking an additional 12 oz of water for every 8 oz of these beverages. Best yet, don’t drink alcohol and keep caffeine to a low level (or quit entirely, if you prefer, but for most people that’s not necessary).
    • If you are sweating (be it because of weather, exercise, or any other reasons), include electrolyte fluids to improve cellular hydration, as they contain essential minerals like magnesium, potassium, and in moderation yes even sodium which you will have lost in your sweat too, supporting fluid regulation.

    For more details on all of these, enjoy:

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