I am reading the latest issue of Science, the magazine put out by AAAS – the American Academy for the Advancement of Science. One of the news items in that issue is entitled Massive study of dog aging likely to lose funding.
One reads, in part, a remark by biogerontologist, Steve Austed of the University of Alabama at Birmingham: “It was going to be the most informative study of aging that was not done in humans.“
The project has a website, Dog Aging Project, from which one finds, under Project Details:
Science’s Best Friend
DOGS & HUMANS
Studying aging in humans is challenging and expensive, but dogs truly are science’s best friends. Even though they age more rapidly than humans, they experience the same diseases of aging, they are genetically diverse, and they share our environment. By studying aging in dogs, we can more quickly expand our knowledge of the aging process not just in dogs but in humans too!
It is a great shame that the likelihood is that the project will cease.
Patrice Ayme is a writer who lives in France and is a person of extreme breadth of knowledge, and very clever to boot.
He writes blog posts on a variety of topics. His latest post is breathtakingly powerful and could be the way we all go over the future years. Read it for yourself online or as follows:
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How Solar System Colonization Will Save Earth
By Patrice Ayme
Saving Earth and colonizing the Solar System are basically the same problem and have the same solution: much more advanced technology [1].There is no contradiction, far from it. There is complementarity, as technology that will have to be developed for space will be found to be useful for Earth. For psycho-political reasons those technologies won’t be developed directly for Earth. So those who complain about space, while claiming we should focus on Earth, get it only half right.
Colonizing Mars with present technology is not going to happen anymore than the technology of the 1960s enabled to colonize the Moon. A visit from a human crew on Mars with the technology SpaceX wants to develop is imaginable… Barely. And those will just be visits, multi-year commitments full of lethal radiation and worse living accommodations than the highest maximum security prison: basically what was done on the Moon in the 1960s, but much more daunting.
It’s much more feasible to establish bases on the Moon. First, there is plenty of oxygen and hydrogen (so water) on the Moon, imprisoned in rocks: one only needs energy to extract them, and the Moon has plenty of that (solar panels!) Second, the gravity well of the Moon is also half that of Mars. Third, the Moon is close by and one can go there all the time (whereas Mars can be visited with present fossil fuel tech only every two years, when the planets align; serious commuting of goods and people between Earth and Mars will require nuclear propulsion).Monitoring robots on the Moon is possible, whereas on Mars, with up to twenty minutes delay, one will have to use advanced, autonomous AI. Fixing problems caused by dust in robots on the Moon with roaming human crews… A solution that won’t exist on Mars, for decades.
Thus AI is the first order solution: AI just needs energy, not shelter, air, water and food. AI colonies on the Moon, and then, later, Mars could build environments that humans could then inhabit. Say pressurized lava tubes…
Skeptics could object that I didn’t roll out specific techs. But space colonization, especially if robot and AI driven, will require much higher tech. For example solar energy, which works wonderfully, was led by its usage in space… where it has long worked splendidly. The solar cells used in space have an efficiency more than twice that of the ones used on the ground… from using more advanced (but expensive) materials, like Gallium… That has invited researchers and companies to boost the efficiency of the silicon and now perovskites cells used on the ground. SpaceX uses Reliable Reusable Rockets (RRR), lowering the cost of space access… That is revolutionary, but actually follows the tech used to land on the Moon in the first place. But the first landing rockets, the LEMS, were Lunar Exploration Modules… They showed the way…
Technology is impossible without wisdom, and wisdom impossible without technology. One can’t grow without the other. The quest for tech is a quest for wisdom.
We don’t need AI on Earth, at least so many “leaders” will think (and they would be very wrong)… However, for space colonization, clearly, we need AI. Space AI will then bring in the Earth AI we need to solve countless problems, including the ones we didn’t think we had.
NASA picture from Curiosity rover on a rather barren, poisonous, irradiated, dusty and dry Mars
P/S: Scifi novels are an old genre: The Birds of Aristophanes, making fun of the colonies Athens established everywhere, by establishing one in the sky, preceded the space colonization of Lucian by seven centuries…
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[1] The European solution to the Earth Crisis has been Mathusianism: use less energy. This weakens Europe and encourages its dictatorial enemies. Actually the best solution is rather the opposite: to use more ABSOLUTE WORTH ENERGY. Use, much more EFFICIENT energy. In particular, we have to leverage fossil fuels to get out of them… using the energy they provide to invent new science and tech….
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Yet another masterpiece from Mr. Ayme. I cannot add anything to this post except to applaud it.
Recovery from addiction is a complex and emotionally taxing process that involves much more than simply abstaining from substance use. It necessitates a holistic approach to healing, which often includes medical treatment, psychotherapy, lifestyle changes, and, for many people, the support of loved ones.
Another source of support that is increasingly recognized for its therapeutic benefits is the companionship of pets. Whether it’s a dog, a cat, or even a bird, pets offer emotional sustenance, non-judgmental companionship, and numerous practical advantages. In this article from Learning from Dogs, we delve into how the presence of a pet can be a transformative experience.
It’s All About a Good Routine
Establishing a stable routine is a cornerstone of addiction recovery. A routine not only provides structure to the day but also instills a sense of responsibility and purpose. Owning a pet naturally requires a routine for feeding, exercise, and care.
This routine can help an individual in recovery stay focused and reduce the void or emptiness often cited as a relapse trigger. Technologies like automated pet feeders can further support this routine, ensuring that your responsibilities are met even when you’re dealing with emotional ups and downs.
Pets Just Make You Feel Better
PsychCentral notes that interacting with pets has been scientifically shown to improve emotional health. Simple actions such as petting a dog or cat trigger the release of “feel-good” hormones like oxytocin, reducing stress and elevating mood.
These emotional benefits are invaluable, especially during the psychologically taxing phases of withdrawal and detoxification. Mental health tracking apps can provide real-time data on your emotional state, often reflecting an improvement correlated with increased time spent with your pet.
Pet-Friendliness and Rehab
Selecting the appropriate rehab facility is an essential step toward a successful recovery journey. An important criterion to consider is the availability of pet-friendly options or the incorporation of pet therapy in the facility’s treatment approach.
Many centers, including local resources for treatment and recovery, are increasingly acknowledging the multifaceted therapeutic advantages that pets can offer and are thus integrating them into their treatment regimens. Specialized online platforms provide comprehensive data about such pet-amicable facilities, empowering individuals to make a well-informed decision.
Diverting from Destructive Urges
Engaging with pets can provide a crucial distraction from cravings and negative thoughts. Whether it’s going for a walk, playing fetch, or simply cuddling on the sofa, these activities require engagement that diverts attention away from destructive patterns. There are even interactive pet toys available now, controlled via smartphone apps, that can keep both the pet and the owner engaged, further reducing idle time that might otherwise lead to cravings.
Pets Make You Social
HABRI points out that owning a pet often encourages social interaction, which can be particularly beneficial during recovery. Whether it’s through meeting other dog owners during walks or engaging in community pet events, these interactions foster a sense of community and belonging. These newly formed social connections can be a significant supportive element in staying sober. Social platforms and apps for pet owners offer a virtual space to connect, share experiences, and seek advice, contributing to a broader support system.
Enhancing Self-Image
Successfully caring for a pet significantly boosts self-esteem and self-worth. Taking responsibility for the well-being of another life generates a sense of accomplishment and purpose, which are foundational in rebuilding one’s life after addiction. Virtual training modules and online courses offer valuable insights into pet care, further increasing competence and confidence in this area.
The journey through addiction recovery is seldom straightforward. It’s a path fraught with challenges, emotional turbulence, and setbacks. However, the simple act of caring for a pet offers an unmatched emotional and practical support system that aids significantly in the recovery process. From establishing routine and boosting emotional well-being to providing a sense of purpose, the benefits are multi-layered and profound. As you navigate through the trials of addiction recovery, the companionship of a pet can become one of your most significant sources of comfort, strength, and hope.
Learning from Dogs serves as a reminder of the values of life and the power of unconditional love – as so many, many dogs prove each and every day. Read more informative articles today!
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HABRI stands for The Human Animal Bond Research Institute and their website is available if you click on the title. I am going to see if I can republish some of HABRI’s articles.
Anyway, thanks to Penny for another great guest post.
It just goes to show the importance of loving an animal, especially a cat or a dog.
I was born in London before the end of World War II and to a great extent my upbringing was in the times of yesterday. But the world has moved on in many, many ways. It is too easy to say that we live in very strange times.
Thus it was enlightening to come across this talk, under the TED Talks banner, quite recently. I have great pleasure in sharing it with you. Plus, Hannah’s website is here. (From which I have taken the following words!)
(P.S. The YouTube video is just over thirteen minutes long. It automatically runs into the next video so you will have to stop it yourself.)
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The word “sustainability” gets thrown around a lot these days. But what does it actually mean for humanity to be sustainable? Environmental data scientist Hannah Ritchie digs into the numbers behind human progress across centuries, unpacking why the conventional understanding of sustainability is misleading and showing how we can be the first generation of humans to actually achieve it.
Why you should listen
Hannah Ritchie is deputy editor and research lead at Our World in Data, an online publication making data and research on the world’s largest problems accessible and understandable for non-experts. She is a senior researcher at the University of Oxford, where she studies how environmental issues intersect with others like poverty, global health and education. She has also done extensive research into the question of how to feed everyone in the world a nutritious diet without wrecking the planet. Her work has appeared in The New York Times, The Washington Post, Vox, Wired, BBC, Al Jazeera, The Economist and New Scientist.
In 2022, Ritchie was named Scotland’s Youth Climate Champion. She is also an honorary fellow at the University of Edinburgh and Edinburgh Centre for Carbon Innovation, and a fellow at the Energy for Growth Hub, focused on ending global energy poverty. Her forthcoming book,The First Generation, makes an evidence-based case for why we have a meaningful chance to solve global environmental problems for the first time in human history.
Astronomers have known for decades that the universe is expanding. When they use telescopes to observe faraway galaxies, they see that these galaxies are moving away from Earth.
To astronomers, the wavelength of light a galaxy emits is longer the faster the galaxy is moving away from us. The farther away the galaxy is, the more its light has shifted toward the longer wavelengths on the red side of the spectrum – so the higher the “redshift.”
Because the speed of light is finite, fast, but not infinitely fast, seeing something far away means we’re looking at the thing how it looked in the past. With distant, high-redshift galaxies, we’re seeing the galaxy when the universe was in a younger state. So “high redshift” corresponds to the early times in the universe, and “low redshift” corresponds to the late times in the universe.
But as astronomers have studied these distances, they’ve learned that the universe is not just expanding – its rate of expansion is accelerating. And that expansion rate is even faster than the leading theory predicts it should be, leaving cosmologists like me puzzled and looking for new explanations.
Dark energy and a cosmological constant
Scientists call the source of this acceleration dark energy. We’re not quite sure what drives dark energy or how it works, but we think its behavior could be explained by a cosmological constant, which is a property of spacetime that contributes to the expansion of the universe.
Albert Einstein originally came up with this constant – he marked it with a lambda in his theory of general relativity. With a cosmological constant, as the universe expands, the energy density of the cosmological constant stays the same.
Imagine a box full of particles. If the volume of the box increases, the density of particles would decrease as they spread out to take up all the space in the box. Now imagine the same box, but as the volume increases, the density of the particles stays the same.
It doesn’t seem intuitive, right? That the energy density of the cosmological constant does not decrease as the universe expands is, of course, very weird, but this property helps explain the accelerating universe.
A standard model of cosmology
Right now, the leading theory, or standard model, of cosmology is called “Lambda CDM.” Lambda denotes the cosmological constant describing dark energy, and CDM stands for cold dark matter. This model describes both the acceleration of the universe in its late stages as well as the expansion rate in its early days.
Specifically, the Lambda CDM explains observations of the cosmic microwave background, which is the afterglow of microwave radiation from when the universe was in a “hot, dense state” about 300,000 years after the Big Bang. Observations using the Planck satellite, which measures the cosmic microwave background, led scientists to create the Lambda CDM model.
Fitting the Lambda CDM model to the cosmic microwave background allows physicists to predict the value of the Hubble constant, which isn’t actually a constant but a measurement describing the universe’s current expansion rate.
But the Lambda CDM model isn’t perfect. The expansion rate scientists have calculated by measuring distances to galaxies, and the expansion rate as described in Lambda CDM using observations of the cosmic microwave background, don’t line up. Astrophysicists call that disagreement the Hubble tension.
The universe is expanding faster than predicted by popular models in cosmology. NASA
The Hubble tension
Over the past few years, I’ve been researching ways to explain this Hubble tension. The tension may be indicating that the Lambda CDM model is incomplete and physicists should modify their model, or it could indicate that it’s time for researchers to come up with new ideas about how the universe works. And new ideas are always the most exciting things for a physicist.
One way to explain the Hubble tension is to modify the Lambda CDM model by changing the expansion rate at low redshift, at late times in the universe. Modifying the model like this can help physicists predict what sort of physical phenomena might be causing the Hubble tension.
For instance, maybe dark energy is not a cosmological constant but instead the result of gravity working in new ways. If this is the case, dark energy would evolve as the universe expands – and the cosmic microwave background, which shows what the universe looked like only a few years after its creation, would have a different prediction for the Hubble constant.
But, my team’s latest research has found that physicists can’t explain the Hubble tension just by changing the expansion rate in the late universe – this whole class of solutions falls short.
Developing new models
To study what types of solutions could explain the Hubble tension, we developed statistical tools that enabled us to test the viability of the entire class of models that change the expansion rate in the late universe. These statistical tools are very flexible, and we used them to match or mimic different models that could potentially fit observations of the universe’s expansion rate and might offer a solution to the Hubble tension.
The models we tested include evolving dark energy models, where dark energy acts differently at different times in the universe. We also tested interacting dark energy-dark matter models, where dark energy interacts with dark matter, and modified gravity models, where gravity acts differently at different times in the universe.
But none of these could fully explain the Hubble tension. These results suggest that physicists should study the early universe to understand the source of the tension.
We take it for granted! Of that I am sure. But the question of how oxygen first came to be built up in our atmosphere is fascinating. There was a recent article written by Elizabeth Swanner, who is Associate Professor of Geology, Iowa State University that was published in The Conversation. It makes for a very interesting read.
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A layered lake is a little like Earth’s early oceans − and lets researchers explore how oxygen built up in our atmosphere billions of years ago
Researchers sample water from various layers to analyze back in the lab. Elizabeth Swanner, CC BY-ND
Little Deming Lake doesn’t get much notice from visitors to Itasca State Park in Minnesota. There’s better boating on nearby Lake Itasca, the headwaters of the Mississippi River. My colleagues and I need to maneuver hundreds of pounds of equipment down a hidden path made narrow by late-summer poison ivy to launch our rowboats.
But modest Deming Lake offers more than meets the eye for me, a geochemist interested in how oxygen built up in the atmosphere 2.4 billion years ago. The absence of oxygen in the deep layers of Deming Lake is something this small body of water has in common with early Earth’s oceans.
On each of our several expeditions here each year, we row our boats out into the deepest part of the lake – over 60 feet (18 meters), despite the lake’s surface area being only 13 acres. We drop an anchor and connect our boats in a flotilla, readying ourselves for the work ahead.
Researchers’ boats on Deming Lake. Elizabeth Swanner, CC BY-ND
Deming Lake is meromictic, a term from Greek that means only partially mixing. In most lakes, at least once a year, the water at the top sinks while the water at the bottom rises because of wind and seasonal temperature changes that affect water’s density. But the deepest waters of Deming Lake never reach the surface. This prevents oxygen in its top layer of water from ever mixing into its deep layer.
Less than 1% of lakes are meromictic, and most that are have dense, salty bottom waters. Deming Lake’s deep waters are not very salty, but of the salts in its bottom waters, iron is one of the most abundant. This makes Deming Lake one of the rarest types of meromictic lakes.
Postdoc researcher Sajjad Akam collects a water sample for chemical analysis back in the lab. Elizabeth Swanner, CC BY-ND
The lake surface is calm, and the still air is glorious on this cool, cloudless August morning. We lower a 2-foot-long water pump zip-tied to a cable attached to four sensors. The sensors measure the temperature, amount of oxygen, pH and amount of chlorophyll in the water at each layer we encounter. We pump water from the most intriguing layers up to the boat and fill a myriad of bottles and tubes, each destined for a different chemical or biological analysis.
My colleagues and I have homed in on Deming Lake to explore questions about how microbial life adapted to and changed the environmental conditions on early Earth. Our planet was inhabited only by microbes for most of its history. The atmosphere and the oceans’ depths didn’t have much oxygen, but they did have a lot of iron, just like Deming Lake does. By investigating what Deming Lake’s microbes are doing, we can better understand how billions of years ago they helped to transform the Earth’s atmosphere and oceans into what they’re like now.
Chlorophyll colors water from the lake slightly green. Elizabeth Swanner, CC BY-ND
At Deming Lake, my colleagues and I pay special attention to the water layer where the chlorophyll readings jump. Chlorophyll is the pigment that makes plants green. It harnesses sunlight energy to turn water and carbon dioxide into oxygen and sugars. Nearly 20 feet (6 meters) below Deming’s surface, the chlorophyll is in cyanobacteria and photosynthetic algae, not plants.
But the curious thing about this layer is that we don’t detect oxygen, despite the abundance of these oxygen-producing organisms. This is the depth where iron concentrations start to climb to the high levels present at the lake’s bottom.
This high-chlorophyll, high-iron and low-oxygen layer is of special interest to us because it might help us understand where cyanobacteria lived in the ancient ocean, how well they were growing and how much oxygen they produced.
We suspect the reason cyanobacteria gather at this depth in Deming Lake is that there is more iron there than at the top of the lake. Just like humans need iron for red blood cells, cyanobacteria need lots of iron to help catalyze the reactions of photosynthesis.
A likely reason we can’t measure any oxygen in this layer is that in addition to cyanobacteria, there are a lot of other bacteria here. After a good long life of a few days, the cyanobacteria die, and the other bacteria feed on their remains. These bacteria rapidly use up any oxygen produced by still photosynthesizing cyanobacteria the way a fire does as it burns through wood.
We know there are lots of bacteria here based on how cloudy the water is, and we see them when we inspect a drop of this water under a microscope. But we need another way to measure photosynthesis besides measuring oxygen levels.
Long-running lakeside laboratory
The other important function of photosynthesis is converting carbon dioxide into sugars, which eventually are used to make more cells. We need a way to track whether new sugars are being made, and if they are, whether it’s by photosynthetic cyanobacteria. So we fill glass bottles with samples of water from this lake layer and seal them tight with rubber stoppers.
We drive the 3 miles back to the Itasca Biological Station and Laboratories where we will set up our experiments. The station opened in 1909 and is home base for us this week, providing comfy cabins, warm meals and this laboratory space.
In the lab, we inject our glass bottle with carbon dioxide that carries an isotopic tracer. If cyanobacteria grow, their cells will incorporate this isotopic marker.
We had a little help to formulate our questions and experiments. University of Minnesota students attending summer field courses collected decades worth of data in Itasca State Park. A diligent university librarian digitized thousands of those students’ final papers.
My students and I pored over the papers concerning Deming Lake, many of which tried to determine whether the cyanobacteria in the chlorophyll-rich layer are doing photosynthesis. While most indicated yes, those students were measuring only oxygen and got ambiguous results. Our use of the isotopic tracer is trickier to implement but will give clearer results.
Graduate students Michelle Chamberlain and Zackry Stevenson about to sink the bottles for incubation in Deming Lake. Elizabeth Swanner, CC BY-ND
That afternoon, we’re back on the lake. We toss an anchor; attached to its rope is a clear plastic bag holding the sealed bottles of lake water now amended with the isotopic tracer. They’ll spend the night in the chlorophyll-rich layer, and we’ll retrieve them after 24 hours. Any longer than that and the isotopic label might end up in the bacteria that eat the dying cyanobacteria instead of the cyanobacteria themselves. We tie off the rope to a floating buoy and head back to the station’s dining hall for our evening meal.
Iron, chlorophyll, oxygen
The next morning, as we wait for the bottles to finish their incubation, we collect water from the different layers of the lake and add some chemicals that kill the cells but preserve their bodies. We’ll look at these samples under the microscope to figure out how many cyanobacteria are in the water, and we’ll measure how much iron is inside the cyanobacteria.
That’s easier said than done, because we have to first separate all the “needles” (cyanobacteria) from the “hay” (other cells) and then clean any iron off the outside of the cyanobacteria. Back at Iowa State University, we’ll shoot the individual cells one by one into a flame that incinerates them, which liberates all the iron they contain so we can measure it.
Biogeochemist Katy Sparrow rows a research vessel to shore. Elizabeth Swanner, CC BY-ND
Our scientific hunch, or hypothesis, is that the cyanobacteria that live in the chlorophyll- and iron-rich layer will contain more iron than cyanobacteria that live in the top lake layer. If they do, it will help us establish that greater access to iron is a motive for living in that deeper and dimmer layer.
These experiments won’t tell the whole story of why it took so long for Earth to build up oxygen, but they will help us to understand a piece of it – where oxygen might have been produced and why, and what happened to oxygen in that environment.
Deming Lake is quickly becoming its own attraction for those with a curiosity about what goes on beneath its tranquil surface – and what that might be able to tell us about how new forms of life took hold long ago on Earth.
I just ran out of time yesterday to publish a proper blog post so I am sharing this photograph with you. It shows Mount Sexton in the distance, just to the right of the fir tree, and two rainbows, it being a rainy afternoon. The camera is facing North-East and the picture was taken at the north end of our rear deck.
For most of us these days old age is part of the scene (and I am classifying old age as being over 70 years). Here are a few facts from the website of the World Health Organization.
Key facts
Worldwide obesity has nearly tripled since 1975.
In 2016, more than 1.9 billion adults, 18 years and older, were overweight. Of these over 650 million were obese.
39% of adults aged 18 years and over were overweight in 2016, and 13% were obese.
Most of the world’s population live in countries where overweight and obesity kills more people than underweight.
39 million children under the age of 5 were overweight or obese in 2020.
Over 340 million children and adolescents aged 5-19 were overweight or obese in 2016.
Obesity is preventable.
What are obesity and overweight Overweight and obesity are defined as abnormal or excessive fat accumulation that may impair health.
Body mass index (BMI) is a simple index of weight-for-height that is commonly used to classify overweight and obesity in adults. It is defined as a person’s weight in kilograms divided by the square of his height in meters (kg/m2).
Adults
For adults, WHO defines overweight and obesity as follows:
overweight is a BMI greater than or equal to 25; and
obesity is a BMI greater than or equal to 30.
BMI provides the most useful population-level measure of overweight and obesity as it is the same for both sexes and for all ages of adults. However, it should be considered a rough guide because it may not correspond to the same degree of fatness in different individuals.
World Health Organisation
This is the link for anyone who wants to use the BMI Calculator.
Now this is not a post about obesity or being overweight. It is a post taken from The Conversation about staying as healthy as one can in one’s older years.
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Steep physical decline with age is not inevitable – here’s how strength training can change the trajectory
Raise your hand if you regularly find yourself walking up a flight of stairs. What about carrying heavy bags of groceries? How about picking up your child or grandchild? Most of us would raise our hands to doing at least one of those weekly, or even daily.
As people age, it can become more and more difficult to perform some physical tasks, even those that are normal activities of daily living. However, prioritizing physical fitness and health as you get older can help you go through your normal day-to-day routine without feeling physically exhausted at the end of the day.
It can also help you continue to have special memories with your family and loved ones that you might not have been able to have if you weren’t physically active. For example, I ran two half-marathons with my dad when he was in his 60s!
I am an exercise physiologist who studies how people can use resistance training to improve human performance, whether it be in sports and other recreational settings, in everyday life, or both. I am also a certified strength and conditioning specialist. My career has given me the opportunity to design exercise programs for kids, college athletes and elderly adults.
Staying physically active as you get older doesn’t need to include running a half-marathon or trying to be a bodybuilder; it could be as simple as trying to get through the day without feeling winded after you go up a flight of stairs. Although our muscles naturally get weaker as we age, there are ways we can combat that to help improve quality of life as we get older.
From left are the author’s father, who was age 61 at the time, the author’s wife and the author after completing the Lincoln Half Marathon. Zachary Gillen, CC BY-NC-ND
Muscle loss and chronic disease
One of the most important parts of exercise programming, no matter who I am working with, is proper resistance training to build muscle strength. Some amount of age-related loss of muscle function is normal and inevitable. But by incorporating resistance training that is appropriate and safe at any ability level, you can slow down the rate of decline and even prevent some loss of muscle function.
In one of our team’s previous studies, we saw that otherwise healthy individuals with sarcopenia had issues delivering vital nutrients to muscle. This could lead to greater likelihood of various diseases, such as Type 2 diabetes, and slow down recovery from exercise.
Recent estimates suggest that sarcopenia affects 10% to 16% of the elderly population worldwide. But even if a person doesn’t have clinically diagnosed sarcopenia, they may still have some of the underlying symptoms that, if not dealt with, could lead to sarcopenia.
Strength training is key
So the question is, what can be done to reverse this decline?
Recent evidence suggests that one of the key factors leading to sarcopenia is low muscle strength. In other words, combating or reversing sarcopenia, or both, may be best done with a proper resistance-training program that prioritizes improving strength. In fact, the decline in muscle strength seems to occur at a much faster rate than the decline in muscle size, underscoring the importance of proper strength training as people age.
Typical age-related changes in muscle strength and size with and without strength training. Zachary Gillen
Continuing to regularly strength train with moderate to heavy weights has been shown to be not only effective at combating the symptoms of sarcopenia but also very safe when done properly. The best way to make sure you are strength training properly is to seek out guidance from a qualified individual such as a personal trainer or strength and conditioning specialist.
Despite the clear benefits of strength training, it’s been shown that only about 13% of Americans age 50 and older do some form of strength training at least twice a week.
Finding what works for you
So how does a person properly strength train as they age?
The National Strength and Conditioning Association, a leading organization in advancing strength and conditioning around the world, states that for older adults, two to three days per week of strength training can be incredibly helpful for maintaining healthy muscle and bone and combating a number of chronic conditions.
The organization recommends that these workouts involve one to two exercises involving multiple joints per major muscle group, with six to 12 repetitions per set. These are done at an intensity of 50% to 85% of what’s known as one-repetition maximum – the most weight you could handle for a single repetition – with the exception of body weight exercises that use one’s own body weight as the resistance, such as pushups.
I would also recommend resting for about two to three minutes between sets, or even up to five minutes if the set was challenging. For older adults, particularly those age 60 and older, the National Strength and Conditioning Association guidelines suggest that a program like this be performed two to three days per week, with 24 to 48 hours between sessions.
An example of a strength training routine for older adults based on the National Strength and Conditioning Association guidelines
There are a great variety of exercises that could be done interchangeably in a strength training program like this.
The guidelines above are only one example out of many options, but they provide a framework that you can use to build your own program. However, I would highly recommend seeking out a professional in the field to give specific exercise programming advice that can be tailored to your own needs and goals as you age.
Following such a program would give your muscles an excellent stimulus to enhance strength, while also allowing enough recovery, a very important consideration as people age. You might think it looks like a huge time commitment, but an exercise routine like this can be done in less than an hour. This means that in less than three hours of strength training per week you can help improve your muscle health and reduce the risk of getting sarcopenia and associated health issues.
It’s also important to note that there is no one right way to do resistance training, and it needn’t involve traditional weight equipment. Group classes like Pilates and yoga or those that involve circuit training and work with resistance bands can all produce similar results. The key is to get out and exercise regularly, whatever that entails.
My wife, Jean, was diagnosed with Parkinson’s Disease (PD) in December, 2015. Many of you know that.
Fortunately at our local Club Northwest there was a group of PD sufferers who twice a week held a ‘Rock Steady Class’ under the instruction of a professional coach; Jean joined the group. It was a brilliant move for Jean and she gets a huge amount of care from being with them.
Luckily for me having to drive Jean into Club Northwest it made sense for me to sign up to a fitness class at the same time so I am put through a regular fitness routine under the coaching of Bruce. Plus I try and go bike riding three times a week.
In other words, we both try and stay as fit as we can.
I was struggling with the post for tomorrow and then saw this article on The Conversation. It may not be everyone’s cup of tea but nevertheless I find it sufficiently interesting to publish it.
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Psychedelics plus psychotherapy can trigger rapid changes in the brain − new research at the level of neurons is untangling how
The human brain can change – but usually only slowly and with great effort, such as when learning a new sport or foreign language, or recovering from a stroke. Learning new skills correlates with changes in the brain, as evidenced by neuroscience research with animals and functional brain scans in people. Presumably, if you master Calculus 1, something is now different in your brain. Furthermore, motor neurons in the brain expand and contract depending on how often they are exercised – a neuronal reflection of “use it or lose it.”
People may wish their brains could change faster – not just when learning new skills, but also when overcoming problems like anxiety, depression and addictions.
Clinicians and scientists know there are times the brain can make rapid, enduring changes. Most often, these occur in the context of traumatic experiences, leaving an indelible imprint on the brain.
A transformative experience can be like a fork in the road, changing the path you are on. Westend61 via Getty Images
Social scientists call events like these psychologically transformative experiences or pivotal mental states. For the rest of us, they’re forks in the road. Presumably, these positive experiences quickly change some “wiring” in the brain.
How do these rapid, positive transformations happen? It seems the brain has a way to facilitate accelerated change. And here’s where it gets really interesting: Psychedelic-assisted psychotherapy appears to tap into this natural neural mechanism.
Psychedelic-assisted psychotherapy
Those who’ve had a psychedelic experience usually describe it as a mental journey that’s impossible to put into words. However, it can be conceptualized as an altered state of consciousness with distortions of perception, modified sense of self and rapidly changing emotions. Presumably there is a relaxation of the higher brain control, which allows deeper brain thoughts and feelings to emerge into conscious awareness.
Research suggests that new skills, memories and attitudes are encoded in the brain by new connections between neurons – sort of like branches of trees growing toward each other. Neuroscientists even call the pattern of growth arborization.
Researchers using a technique called two-photon microscopy can observe this process in living cells by following the formation and regression of spines on the neurons. The spines are one half of the synapses that allow for communication between one neuron and another.
Scientists have thought that enduring spine formation could be established only with focused, repetitive mental energy. However, a lab at Yale recently documented rapid spine formation in the frontal cortex of mice after one dose of psilocybin. Researchers found that mice given the mushroom-derived drug had about a 10% increase in spine formation. These changes had occurred when examined one day after treatment and endured for over a month.
Tiny spines along a neuron’s branches are a crucial part of how one neuron receives a message from another. Edmund S. Higgins
A mechanism for psychedelic-induced change
Psychoactive molecules primarily change brain function through the receptors on the neural cells. The serotonin receptor 5HT, the one famously tweaked by antidepressants, comes in a variety of subtypes. Psychedelics such as DMT, the active chemical in the plant-based psychedelic ayahuasca, stimulate a receptor cell type, called 5-HT2A. This receptor also appears to mediate the hyperplastic states when a brain is changing quickly.
These 5-HT2A receptors that DMT activates are not only on the neuron cell surface but also inside the neuron. It’s only the 5-HT2A receptor inside the cell that facilitates rapid change in neuronal structure. Serotonin can’t get through the cell membrane, which is why people don’t hallucinate when taking antidepressants like Prozac or Zoloft. The psychedelics, on the other hand, slip through the cell’s exterior and tweak the 5-HT2A receptor, stimulating dendritic growth and increased spine formation.
Here’s where this story all comes together. In addition to being the active ingredient in ayahuasca, DMT is an endogenous molecule synthesized naturally in mammalian brains. As such, human neurons are capable of producing their own “psychedelic” molecule, although likely in tiny quantities. It’s possible the brain uses its own endogenous DMT as a tool for change – as when forming dendritic spines on neurons – to encode pivotal mental states. And it’s possible psychedelic-assisted psychotherapy uses this naturally occurring neural mechanism to facilitate healing.
A word of caution
In her essay collection “These Precious Days,” author Ann Patchett describes taking mushrooms with a friend who was struggling with pancreatic cancer. The friend had a mystical experience and came away feeling deeper connections to her family and friends. Patchett, on the other hand, said she spent eight hours “hacking up snakes in some pitch-black cauldron of lava at the center of the Earth.” It felt like death to her.
Psychedelics are powerful, and none of the classic psychedelic drugs, such as LSD, are approved yet for treatment. The U.S. Food and Drug Administration in 2019 did approve ketamine, in conjunction with an antidepressant, to treat depression in adults. Psychedelic-assisted psychotherapy with MDMA (often called ecstasy or molly) for PTSD and psilocybin for depression are in Phase 3 trials.
Back on September 19th I received an email offering me a guest post. It was from Luna Angeni. At first I was highly suspicious thinking of scams and the like and replied: “Before responding further please explain what your niche is?”
Luna replied: “Thank you for your response. I’m working on Animal Health care. It’s the perfect fit for your site.”
I agreed and this is her article.
ooOOoo
How to Control and Prevent Common Dog Diseases Effectively
By Luna Angeni
“Man’s best friend” is a phrase that perfectly defines the deep bond between humans and their canine companions.
It’s our duty to ensure the health and well-being of our furry friends. One of the most critical aspects of canine care is disease prevention and control. This is what we are going to focus on here.
In this blog, we will learn about some effective ways we can control and prevent common dog diseases to keep our canine fellows happy and healthy.
Let’s get started!
Understanding Common Dog Diseases
Dogs, like humans, are susceptible to a range of diseases and health issues.
To effectively control and prevent these complications, we need to understand them first.
Let’s review some common canine diseases:
Canine Parvovirus (Parvo)
Canine parvovirus is a highly contagious and potentially fatal disease that affects puppies and unvaccinated dogs.
It spreads through direct contact with an infected dog or contaminated environment.
Symptoms include:
1. Severe diarrhea
2. Vomiting 3. Lethargy 4. Loss of appetite
To prevent parvo, ensure your dog is up-to-date on vaccinations and avoid areas where the virus may be present.
Canine Distemper
Canine distemper is another contagious viral disease that can be fatal, particularly in puppies.
It affects various body systems and presents symptoms such as:
1. Fever 2. Nasal discharge
3. Coughing 4. Neurological signs
Vaccination is the most effective way to prevent distemper.
Heartworm Disease
Heartworm disease is transmitted through mosquito bites and can be life-threatening if left untreated.
It affects the heart and lungs, leading to symptoms like:
1. Coughing 2. Exercise intolerance
3. Weight loss
Prevention through vaccination is key for this common dog disease.
Preventive Measures for Common Canine Diseases
Preventing common dog diseases is often more manageable than treating them.
Here are some essential preventive measures every dog owner should follow:
Vaccination
Regular vaccination is the cornerstone of disease prevention in dogs.
As your veterinarian recommends, ensure your dog receives all necessary vaccinations against parvovirus, distemper, rabies, and others.
Regular Exercise
Exercise not only keeps your dog physically fit but also mentally stimulated.
Engaging in regular exercise helps boost dogs’ overall health and keeps obesity-related diseases at bay.
Proper Nutrition
A balanced diet is crucial for maintaining a healthy immune system.
Consult your veterinarian to determine the best diet for your dog’s specific needs.
Avoid feeding your canine human food, as some ingredients can be toxic to them.
Hygiene and Cleanliness
Maintaining proper hygiene for your dog and their living environment is essential.
In this regard, you must ensure:
1. Regular grooming 2. Cleaning your dog’s bedding 3. Keeping their living area free from parasites and bacteria
Regular Vet Check-ups
Routine visits to the veterinarian are crucial for early disease detection and prevention.
Your vet can identify potential health issues before they become severe and provide guidance on maintaining your dog’s health.
Recognizing the Signs of Illness
Despite your best efforts, your dog may still fall ill occasionally.
Recognizing the early signs of common dog diseases is essential for prompt treatment.
Here are some common signs of complications in dogs:
Changes in Appetite
A sudden loss of appetite or excessive hunger can indicate a health issue.
So, you must monitor your dog’s eating habits closely.
Changes in Behavior
Drastic changes in behavior, such as increased aggression, withdrawal, or excessive vocalization, can be indicative of pain or discomfort.
Vomiting and Diarrhea
Frequent vomiting or diarrhea can be symptomatic of various diseases, including gastrointestinal complications.
Lethargy
If your dog is unusually lethargic or lacks energy, it could be a sign of an underlying problem.
In such cases, seek a veterinarian’s help immediately.
Breathing Problems
Labored breathing, coughing, or wheezing may suggest respiratory or cardiac problems.
Immediate Action and Veterinary Care
Taking immediate action is essential if you notice any signs of illness or discomfort in your dog.
Contact your veterinarian and follow their guidance.
Early intervention can often make a significant difference in the outcome of the disease.
Conclusion
Your dog’s health is in your hands.
Effective disease control and prevention are crucial for ensuring your furry friend’s long and happy life.
Understanding common dog diseases and treatment and following preventive measures can significantly reduce the risk of complications and provide them with the best possible care.
For more guides on animal health solutions and tips for healthy dogs, you must visit Vet and Tech – a source for online veterinary education.
FAQs
What Vaccinations Does My Dog Need?
Consult your vet for a personalized vaccination schedule. Common dog vaccinations include rabies, distemper, parvovirus, and kennel cough.
What’s the Best Diet for My Dog?
High-quality commercial dog food is a good option. Still, you need to consult your vet for a diet tailored to your dog’s age, breed, and health.
How Often Should I Take My Dog to the Vet?
Generally, annual check-ups are recommended, but older dogs can benefit more from biannual visits. And–puppies may need more frequent check-ups.
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That is a wonderful set of recommendations and advice. Really of no surprise when one considers Luna’s biography:
I am a clinical veterinarian, researcher, and professional content writer. Being a medical professional and a content writer, I hold key writing skills such as Blog writing. I shall provide beautifully crafted, interesting to read, easily understood, highly informative, 100% original, error, and plagiarism-free content.
Luna Angeni
I sincerely hope this will be far from the one and only post!
P.S. I also openly admit that I have featured her blog site Vet and Tech but will also explain that I have no special association with her blog or with Luna Angeni.
Learning from Dogs 
