Is A Visible Six-Pack Obtainable Regardless Of Genetic Predisposition?
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❝Is it possible for anyone to get 6-pack abs (even if genetics makes it easier or harder) and how much does it matter for health e.g. waist size etc?❞
Let’s break it down into two parts:
Is it possible for anyone to get 6-pack abs (even if genetics makes it easier or harder)?
Short answer: no
First, a quick anatomy lesson: while “abs” (abdominal muscles) are considered in the plural and indeed they are, what we see as a six-pack is actually only one muscle, the rectus abdominis, which is nestled in between other abdominal muscles that are beyond the scope of our answer here.
The reason that the rectus abdominis looks like six muscles is because there are bands of fascia (connective tissue) lying over it, so we see where it bulges between those bands.
The main difference genes make are as follows:
- Number of fascia bands (and thus the reason that some people get a four-, six-, eight-, or rarely, even ten-pack). Obviously, no amount of training can change this number, any more than doing extra bicep curls will grow you additional arms.
- Density of muscle fibers. Some people have what has been called “superathlete muscle type”, which, while prized by Olympians and other athletes, is on bodybuilding forums less glamorously called being a “hard gainer”. What this means is that muscle fibers are denser, so while training will make muscles stronger, you won’t see as much difference in size. This means that size for size, the person with this muscle type will always be stronger than someone the same size without it, but that may be annoying if you’re trying to build visible definition.
- Twitch type of muscle fibers. Some people have more fast-twitch fibers, some have more slow-twitch fibers. Fast-twitch fibers are better suited for visible abs (and, as the name suggests, quick changes between contracting and relaxing). Slow-twitch fibers are better for endurance, but yield less bulky muscles.
- Inclination to subcutaneous fat storage. This is by no means purely genetic; hormones make the biggest difference, followed by diet. But, genes are an influencing factor, and if your body fat percentage is inclined to be higher than someone else’s, then it’ll take more work to see muscle definition under that fat.
The first of those items is why our simple answer is “no”; because some people are destined to, if muscle is visible, have a four-, eight, or (rarely) ten-pack, making a six-pack unobtainable.
It’s worth noting here that while a bigger number is more highly prized aesthetically, there is literally zero difference healthwise or in terms of performance, because it’s nothing to do with the muscle, and is only about the fascia layout.
The density of muscle fibers is again purely genetic, but it only makes things easier or harder; this part’s not impossible for anyone.
The inclination to subcutaneous fat storage is by far the most modifiable factor, and the thus most readily overcome, if you feel so inclined. That doesn’t mean it will necessarily be easy! But it does mean that it’s relatively less difficult than the others.
How much does it matter for health, e.g. waist size etc?
As you may have gathered from the above, having a six-pack (or indeed a differently-numbered “pack”, if that be your genetic lot) makes no important difference to health:
- The fascia layout is completely irrelevant to health
- The muscle fiber types do make a difference to athletic performance, but not general health when at rest
- The subcutaneous fat storage is a health factor, but probably not how most people think
Healthy body fat percentages are (assuming normal hormones) in the range of 20–25% for women and 15–20% for men.
For most people, having clearly visible abs requires going below those healthy levels. For most people, that’s not optimally healthy. And those you see on magazine covers or in bodybuilding competitions are usually acutely dehydrated for the photo, which is of course not good. They will rehydrate after the shoot.
However, waist size (especially as a ratio, compared to hip size) is very important to health. This has less to do with subcutaneous fat, though, and is more to do with visceral belly fat, which goes under the muscles and thus does not obscure them:
Visceral Belly Fat & How To Lose It
One final note: fat notwithstanding, and aesthetics notwithstanding, having a strong core is very good for general health; it helps keeps one’s internal organs in place and well-protected, and improves stability, making falls less likely as we get older. Additionally, having muscle improves our metabolic base rate, which is good for our heart. Abs are just one part of core strength (the back being important too, for example), but should not be neglected.
Top-tier exercises to do include planks, and hanging leg raises (i.e. hang from some support, such as a chin-up bar, and raise your legs, which counterintuitively works your abs a lot more than your legs).
Take care!
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Cheeky diet soft drink getting you through the work day? Here’s what that may mean for your health
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Many people are drinking less sugary soft drink than in the past. This is a great win for public health, given the recognised risks of diets high in sugar-sweetened drinks.
But over time, intake of diet soft drinks has grown. In fact, it’s so high that these products are now regularly detected in wastewater.
So what does the research say about how your health is affected in the long term if you drink them often?
Breakingpic/Pexels What makes diet soft drinks sweet?
The World Health Organization (WHO) advises people “reduce their daily intake of free sugars to less than 10% of their total energy intake. A further reduction to below 5% or roughly 25 grams (six teaspoons) per day would provide additional health benefits.”
But most regular soft drinks contain a lot of sugar. A regular 335 millilitre can of original Coca-Cola contains at least seven teaspoons of added sugar.
Diet soft drinks are designed to taste similar to regular soft drinks but without the sugar. Instead of sugar, diet soft drinks contain artificial or natural sweeteners. The artificial sweeteners include aspartame, saccharin and sucralose. The natural sweeteners include stevia and monk fruit extract, which come from plant sources.
Many artificial sweeteners are much sweeter than sugar so less is needed to provide the same burst of sweetness.
Diet soft drinks are marketed as healthier alternatives to regular soft drinks, particularly for people who want to reduce their sugar intake or manage their weight.
But while surveys of Australian adults and adolescents show most people understand the benefits of reducing their sugar intake, they often aren’t as aware about how diet drinks may affect health more broadly.
Diet soft drinks contain artificial or natural sweeteners. Vintage Tone/Shutterstock What does the research say about aspartame?
The artificial sweeteners in soft drinks are considered safe for consumption by food authorities, including in the US and Australia. However, some researchers have raised concern about the long-term risks of consumption.
People who drink diet soft drinks regularly and often are more likely to develop certain metabolic conditions (such as diabetes and heart disease) than those who don’t drink diet soft drinks.
The link was found even after accounting for other dietary and lifestyle factors (such as physical activity).
In 2023, the WHO announced reports had found aspartame – the main sweetener used in diet soft drinks – was “possibly carcinogenic to humans” (carcinogenic means cancer-causing).
Importantly though, the report noted there is not enough current scientific evidence to be truly confident aspartame may increase the risk of cancer and emphasised it’s safe to consume occasionally.
Will diet soft drinks help manage weight?
Despite the word “diet” in the name, diet soft drinks are not strongly linked with weight management.
In 2022, the WHO conducted a systematic review (where researchers look at all available evidence on a topic) on whether the use of artificial sweeteners is beneficial for weight management.
Overall, the randomised controlled trials they looked at suggested slightly more weight loss in people who used artificial sweeteners.
But the observational studies (where no intervention occurs and participants are monitored over time) found people who consume high amounts of artificial sweeteners tended to have an increased risk of higher body mass index and a 76% increased likelihood of having obesity.
In other words, artificial sweeteners may not directly help manage weight over the long term. This resulted in the WHO advising artificial sweeteners should not be used to manage weight.
Studies in animals have suggested consuming high levels of artificial sweeteners can signal to the brain it is being starved of fuel, which can lead to more eating. However, the evidence for this happening in humans is still unproven.
You can’t go wrong with water. hurricanehank/Shutterstock What about inflammation and dental issues?
There is some early evidence artificial sweeteners may irritate the lining of the digestive system, causing inflammation and increasing the likelihood of diarrhoea, constipation, bloating and other symptoms often associated with irritable bowel syndrome. However, this study noted more research is needed.
High amounts of diet soft drinks have also been linked with liver disease, which is based on inflammation.
The consumption of diet soft drinks is also associated with dental erosion.
Many soft drinks contain phosphoric and citric acid, which can damage your tooth enamel and contribute to dental erosion.
Moderation is key
As with many aspects of nutrition, moderation is key with diet soft drinks.
Drinking diet soft drinks occasionally is unlikely to harm your health, but frequent or excessive intake may increase health risks in the longer term.
Plain water, infused water, sparkling water, herbal teas or milks remain the best options for hydration.
Lauren Ball, Professor of Community Health and Wellbeing, The University of Queensland and Emily Burch, Accredited Practising Dietitian and Lecturer, Southern Cross University
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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Ayurveda’s Contributions To Science
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Ayurveda’s Contributions To Science (Without Being Itself Rooted in Scientific Method)
Yesterday, we asked you for your opinions on ayurveda, and got the above-depicted, below-described, set of responses. Of those who responded…
- A little over 41% said “I don’t know what ayurveda is without looking it up”
- A little over 37% said “It is a fine branch of health science with millennia of evidence”
- A little over 16% said “It gets some things right, but not by actual science”
- A little over 4% said “It is a potentially dangerous pseudoscience”
So, what does the science say?
Ayurveda is scientific: True or False?
False, simply. Let’s just rip the band-aid off in this case. That doesn’t mean it’s necessarily without merit, though!
Let’s put it this way:
- If you drink coffee to feel more awake because scientific method has discerned that caffeine has vasoconstrictive and adenosine-blocking effects while also promoting dopaminergic activity, then your consumption of coffee is evidence-based and scientific. Great!
- If you drink coffee to feel more awake because somebody told you that that somebody told them that it energizes you by balancing the elements fire (the heat of the coffee), air (the little bubbles on top), earth (the coffee grinds), water (the water), and ether (steam), then that isneither evidence-based nor scientific, but it will still work exactly the same.
Ayurveda is a little like that. It’s an ancient traditional Indian medicine, based on a combination of anecdotal evidence and supposition.
- The anecdotal evidence from ayurveda has often resulted in herbal remedies that, in modern scientific trials, have been found to have merit.
- Ayurvedic meditative practices also have a large overlap with modern mindfulness practices, and have also been found to have merit
- Ayurveda also promotes the practice of yoga, which is indeed a very healthful activity
- The supposition from ayurveda is based largely in those five elements we mentioned above, as well as a “balancing of humors” comparable to medieval European medicine, and from a scientific perspective, is simply a hypothesis with no evidence to support it.
Note: while ayurveda is commonly described as a science by its practitioners in the modern age, it did not originally claim to be scientific, but rather, wisdom handed down directly by the god Dhanvantari.
Ayurveda gets some things right: True or False?
True! Indeed, we covered some before in 10almonds; you may remember:
Bacopa Monnieri: A Well-Evidenced Cognitive Enhancer
(Bacopa monnieri is also known by its name in ayurveda, brahmi)
There are many other herbs that have made their way from ayurveda into modern science, but the above is a stand-out example. Others include:
- Ashwagandha: The Root of All Even-Mindedness?
- Boswellia serrata (Frankincense) Against Pain and Depression/Anxiety
Yoga and meditation are also great, and not only that, but great by science, for example:
- NCCIH | Yoga for Health: Clinical Guidelines, Scientific Literature, Info for Patients
- The Neuroscience of Mindfulness: How Mindfulness Alters the Brain and Facilitates Emotion Regulation
Ayurveda is a potentially dangerous pseudoscience: True or False?
Also True! We covered why it’s a pseudoscience above, but that doesn’t make it potentially dangerous, per se (you’ll remember our coffee example).
What does, however, make it potentially dangerous (dose-dependent) is its use of heavy metals such as lead, mercury, and arsenic:
Heavy Metal Content of Ayurvedic Herbal Medicine Products
Some final thoughts…
Want to learn more about the sometimes beneficial, sometimes uneasy relationship between ayurveda and modern science?
A lot of scholarly articles trying to bridge (or further separate) the two were very biased one way or the other.
Instead, here’s one that’s reasonably optimistic with regard to ayurveda’s potential for good, while being realistic about how it currently stands:
Development of Ayurveda—Tradition to trend
Take care!
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Cold Weather Health Risks
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Many Are Cold; Few Are Frozen
Many of those of us in the Northern Hemisphere are getting hit with a cold spell around now. How severe that may be depends on more precisely where we are, but it’s affecting a lot of people. So, with apologies to our readers in Australia, we’re going to do a special on that today.
Acute cold is, for most people, good for the health:
A Cold Shower A Day Keeps The Doctor Away?
Persistent cold, not so much. Let’s look at the risks, and what can be done about them…
Hypothermia
It kills. Don’t let it kill you or your loved ones.
And, this is really important: it doesn’t care whether you’re on a mountain or not.
In other words: a lot of people understand (correctly!) that hypothermia is a big risk to hikers, climbers, and the like. But if the heating goes out in your house and the temperature drops for long enough before the heating is fixed, you can get hypothermia there too just the same if you’re not careful.
How cold is too cold? It doesn’t even have to be sub-zero. According to the CDC, temperatures of 4℃ (40℉) can be low enough to cause hypothermia if other factors combine:
CDC | Prevent Hypothermia & Frostbite ← you can also see the list of symptoms to watch out for, there!
Skin health
Not generally an existential risk, but we may as well stay healthy as not!
Cold air often means dry air, so use a moisturizer with an oil base (if you don’t care for fancy beauty products, ordinary coconut oil is top-tier).
Bonus if you do it after a warming bath/shower!
Heart health
Cold has a vasconstricting effect; that is to say, it causes the body’s vasculature to shrink, increasing localized blood pressure. If it’s a cold shower as above, that can be very invigorating. If it’s a week of sub-zero temperatures, it can become a problem.
❝Shoveling a little snow off your sidewalk may not seem like hard work. However, […] combined with the fact that the exposure to cold air can constrict blood vessels throughout the body, you’re asking your heart to do a lot more work in conditions that are diminishing the heart’s ability to function at its best.❞
Source: Snow shoveling, cold temperatures combine for perfect storm of heart health hazards
If you have a heart condition, please do not shovel snow. Let someone else do it, or stay put.
And if you are normally able to exercise safely? Unless you’re sure your heart is in good order, exercising in the warmth, not the cold, seems to be the best bet.
See also: Heart Attack: His & Hers (Be Prepared!) ← can you remember which symptoms are for which sex? If not, now’s a good time to refresh that knowledge.
Immune health
We recently discussed how cold weather indirectly increases the risk of respiratory viral infection:
The Cold Truth About Respiratory Infections
So, now’s the time to be extra on-guard about that.
See also: Beyond Supplements: The Real Immune-Boosters!
Balance
Icy weather increases the risk of falling. If you think “having a fall” is something that happens to other/older people, please remember that there’s a first time for everything. Some tips:
- Walk across icy patches with small steps in a flat-footed fashion like a penguin.
- It may not be glamorous, but neither is going A-over-T and breaking (or even just spraining) things.
- Use a handrail if available, even if you don’t think you need to.
You can also check out our previous article about falling (avoiding falling, minimizing the damage of falling, etc):
Fall Special: Some Fall-Themed Advice
Take care!
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- Walk across icy patches with small steps in a flat-footed fashion like a penguin.
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Eat Better, Feel Better – by Giada de Laurentis
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In yesterday’s edition of 10almonds, we reviewed Dr. Aujla’s “The Doctor’s Kitchen“; today we’re reviewing a different book about healing through food—in this case, with a special focus on maintaining energy and good health as we get older.
De Laurentis may not be a medical doctor, but she is a TV chef, and not only holds a lot of influence, but also has access to a lot of celebrity doctors and such; that’s reflected a lot in her style and approach here.
The recipes are clear and easy to follow; well-illustrated and nicely laid-out.
This cookbook’s style is less “enjoy this hearty dish of rice and beans with these herbs and spices” and more “you can serve your steak salad with white beans and sweet shallot dressing on a bed of organic quinoa if you haven’t already had your day’s serving of grains, of course”.
It’s a little fancier, in short, and more focused on what to cut out, than what to include. On account of that, this could make it a good contrast to yesterday’s book, which had the opposite focus.
She also recommends assorted adjuvant practices; some that are evidence-based, like intermittent fasting and meditation, and some that are not, like extreme detox-dieting, and acupuncture (which has no bearing on gut health).
Bottom line: if you like the idea of eating for good health, and prefer a touch of celebrity lifestyle to your meals, this one’s a good book for you.
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How much weight do you actually need to lose? It might be a lot less than you think
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If you’re one of the one in three Australians whose New Year’s resolution involved losing weight, it’s likely you’re now contemplating what weight-loss goal you should actually be working towards.
But type “setting a weight loss goal” into any online search engine and you’ll likely be left with more questions than answers.
Sure, the many weight-loss apps and calculators available will make setting this goal seem easy. They’ll typically use a body mass index (BMI) calculator to confirm a “healthy” weight and provide a goal weight based on this range.
Your screen will fill with trim-looking influencers touting diets that will help you drop ten kilos in a month, or ads for diets, pills and exercise regimens promising to help you effortlessly and rapidly lose weight.
Most sales pitches will suggest you need to lose substantial amounts of weight to be healthy – making weight loss seem an impossible task. But the research shows you don’t need to lose a lot of weight to achieve health benefits.
Using BMI to define our target weight is flawed
We’re a society fixated on numbers. So it’s no surprise we use measurements and equations to score our weight. The most popular is BMI, a measure of our body weight-to-height ratio.
BMI classifies bodies as underweight, normal (healthy) weight, overweight or obese and can be a useful tool for weight and health screening.
But it shouldn’t be used as the single measure of what it means to be a healthy weight when we set our weight-loss goals. This is because it:
- fails to consider two critical factors related to body weight and health – body fat percentage and distribution
- does not account for significant differences in body composition based on gender, ethnicity and age.
How does losing weight benefit our health?
Losing just 5–10% of our body weight – between 6 and 12kg for someone weighing 120kg – can significantly improve our health in four key ways.
1. Reducing cholesterol
Obesity increases the chances of having too much low-density lipoprotein (LDL) cholesterol – also known as bad cholesterol – because carrying excess weight changes how our bodies produce and manage lipoproteins and triglycerides, another fat molecule we use for energy.
Having too much bad cholesterol and high triglyceride levels is not good, narrowing our arteries and limiting blood flow, which increases the risk of heart disease, heart attack and stroke.
But research shows improvements in total cholesterol, LDL cholesterol and triglyceride levels are evident with just 5% weight loss.
2. Lowering blood pressure
Our blood pressure is considered high if it reads more than 140/90 on at least two occasions.
Excess weight is linked to high blood pressure in several ways, including changing how our sympathetic nervous system, blood vessels and hormones regulate our blood pressure.
Essentially, high blood pressure makes our heart and blood vessels work harder and less efficiently, damaging our arteries over time and increasing our risk of heart disease, heart attack and stroke.
Losing weight can lower your blood pressure.
Prostock-studio/ShutterstockLike the improvements in cholesterol, a 5% weight loss improves both systolic blood pressure (the first number in the reading) and diastolic blood pressure (the second number).
A meta-analysis of 25 trials on the influence of weight reduction on blood pressure also found every kilo of weight loss improved blood pressure by one point.
3. Reducing risk for type 2 diabetes
Excess body weight is the primary manageable risk factor for type 2 diabetes, particularly for people carrying a lot of visceral fat around the abdomen (belly fat).
Carrying this excess weight can cause fat cells to release pro-inflammatory chemicals that disrupt how our bodies regulate and use the insulin produced by our pancreas, leading to high blood sugar levels.
Type 2 diabetes can lead to serious medical conditions if it’s not carefully managed, including damaging our heart, blood vessels, major organs, eyes and nervous system.
Research shows just 7% weight loss reduces risk of developing type 2 diabetes by 58%.
4. Reducing joint pain and the risk of osteoarthritis
Carrying excess weight can cause our joints to become inflamed and damaged, making us more prone to osteoarthritis.
Observational studies show being overweight doubles a person’s risk of developing osteoarthritis, while obesity increases the risk fourfold.
Small amounts of weight loss alleviate this stress on our joints. In one study each kilogram of weight loss resulted in a fourfold decrease in the load exerted on the knee in each step taken during daily activities.
Losing weight eases stress on joints.
Shutterstock/Rostislav_SedlacekFocus on long-term habits
If you’ve ever tried to lose weight but found the kilos return almost as quickly as they left, you’re not alone.
An analysis of 29 long-term weight-loss studies found participants regained more than half of the weight lost within two years. Within five years, they regained more than 80%.
When we lose weight, we take our body out of its comfort zone and trigger its survival response. It then counteracts weight loss, triggering several physiological responses to defend our body weight and “survive” starvation.
Just as the problem is evolutionary, the solution is evolutionary too. Successfully losing weight long-term comes down to:
losing weight in small manageable chunks you can sustain, specifically periods of weight loss, followed by periods of weight maintenance, and so on, until you achieve your goal weight
making gradual changes to your lifestyle to ensure you form habits that last a lifetime.
Setting a goal to reach a healthy weight can feel daunting. But it doesn’t have to be a pre-defined weight according to a “healthy” BMI range. Losing 5–10% of our body weight will result in immediate health benefits.
At the Boden Group, Charles Perkins Centre, we are studying the science of obesity and running clinical trials for weight loss. You can register here to express your interest.
Nick Fuller, Charles Perkins Centre Research Program Leader, University of Sydney
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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The End of Alzheimer’s – by Dr. Dale Bredesen
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This one didn’t use the “The New Science Of…” subtitle that many books do, and this one actually is a “new science of”!
Which is exciting, and/but comes with the caveat that the overall protocol itself is still undergoing testing, but the results so far are promising. The constituent parts of the protocol are for the most already well-established, but have not previously been put together in this way.
Dr. Bredesen argues that Alzheimer’s Disease is not one condition but three (medical consensus agrees at least that it is a collection of conditions, but different schools of thought slice them differently), and outlines 36 metabolic factors that are implicated, and the good news is, most of them are within our control.
Since there’s a lot to put together, he also offers many workarounds and “crutches”, making for very practical advice.
The style of the book is on the hard end of pop-science, that is to say while the feel and tone is very pop-sciencey, there are nevertheless a lot of words that you might know but your spellchecker probably wouldn’t. He does explain everything along the way, but this does mean that if you’re not already well-versed, you can’t just dip in to a later point without reading the earlier parts.
Bottom line: even if you only implement half the advice in this book, you’ll be doing your long-term cognitive health a huge favor.
Click here to check out The End of Alzheimer’s, and keep cognitive decline at bay!
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