Shadowing Practice: Why Walking Every Day Changes Your Body (Doctor Explains) - Learn English Speaking with Video
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So walking is probably the most underrated health intervention that exists.
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I recommend it to all of my patients.
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And I get that that sounds like a bit of a bold claim
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when we live in this world full of expensive gym memberships
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and protocols and Peloton and supplement stacks and all of that other expensive stuff.
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But the research on what consistent daily walking does to your body is remarkable.
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You can't really ignore this stuff.
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And most people have no idea how far these benefits actually
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go beyond just sort of burning a few calories here and there.
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I'm Dr. Alex.
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I'm an emergency medicine doctor with nearly a decade working across the NHS.
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And my goal these days is to help you prevent the end stage disease that I see every single day, to teach you what I've learned over the years.
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Now, one thing that I've noticed consistently during this time is
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that there is a clear difference between patients who walk into the cubicle and those who struggle to walk.
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The ones still walking regularly as they get older, they recover faster, they have fewer complications and they stay independent for longer.
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What we know is
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that movement is one of the most powerful predictors of how well somebody ages and how long you live.
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Now, I'm only 33, so you'd think that this wouldn't really apply to me yet, but we got a golden Labrador called Mango about a year ago.
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We got him as a little tiny baby, and as his exercise tolerance increased as he got bigger, we had to walk him further and further every single day.
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So now we walk him three times a day, morning, afternoon, and evening.
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And the changes that I noticed in myself were really hard to ignore.
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my baseline fitness increased my legs became noticeably stronger
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because we live in such a hilly area my mood got significantly better this is probably the most remarkable thing
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that I noticed about myself and my appetite became much more regular as well I'm somebody
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that craves really sugary foods all the time so
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when I'm telling you that this research is really compelling I'm also telling you
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that it matches what I've experienced firsthand
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so in this video what I'm going to do is walk you through nine things
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that consistently show up in the research when people walk every single day.
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We'll talk about your heart health, your kidneys, your liver, your joints, your muscle, and ultimately your entire longevity.
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And at the end of the video, what I'll do is give you a specific framework for actually implementing all of this,
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because that's the part that most videos seem to skip over.
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And just really quickly before we carry on, only about a quarter of you who watch these videos have actually subscribed to the channel.
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So if you find these videos useful, then please, please, please consider subscribing.
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It really, really does help an enormous amount.
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So the first one, and the evidence here is about as robust as it gets in lifestyle medicine,
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is that walking has a significant effect on your cardiovascular risk.
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There are tons of studies out there, but there's a very large meta-analysis published in the European Journal of Preventative cardiology
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which collected data from over 400,000 people and it found
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that walking was associated with a significant reduction in cardiovascular mortality
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and the dose-response relationship was incredibly clear meaning
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that more steps correlated with a lower risk with the benefits sort of starting to plateau out somewhere between seven
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and ten thousand steps per day for cardiovascular outcomes specifically now what's happening physiologically is that regular walking improves your endothelial function,
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which is the health of the inner lining of your blood vessels.
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And I talk about this all the time.
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It seems to be pretty much every video now.
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And what that does is that it reduces the stiffness of your arteries, improves your resting blood pressure, it improves your lipid profile,
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and it reduces systemic inflammation.
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And all of those things are independent cardiovascular risk factors that walking addresses all at the same time.
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The landmark Nurses Health Study, which followed over 72,000 women over eight years,
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found that those who walked briskly for at least three hours per week
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had a 35% lower risk of a heart attack compared to people who didn't walk, people who were sedentary.
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Now that is a staggering reduction from something as simple as walking.
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Now number two is all about your blood pressure and this one deserves its own section because hypertension,
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high blood pressure, is one of the most common conditions that we see in emergency medicine every single day.
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I would say that probably over half of the people that I see have a blood pressure over 140 systolic, and that is getting into pretty dangerous territory there.
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And the reason it's so important is because it damages your blood vessels silently over years,
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and it's a major driver of heart attacks and strokes and kidney disease.
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And walking done consistently has a really meaningful effect on it.
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There was a really big study published in the Journal of Hypertension, and it was looking at these types of walking interventions in different groups of people.
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And it found average reductions of around three to four millimeters of mercury, which is the unit of blood pressure,
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in systolic blood pressure, which is the top number from regular walking programs.
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Now, that might not sound like much, but in population terms,
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a three-point reduction in your average systolic blood pressure is associated with massive reduced rates of stroke and heart attacks.
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And for people with stage one hypertension, so below 140 systolic, that kind of reduction from lifestyle alone can sometimes be enough to avoid medication
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or at least delay it for a few years.
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Moving on to number three, which is that your blood sugar regulation improves massively.
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So every time you walk, your contracting leg muscles take up glucose from the bloodstream through a pathway that is partially independent of insulin.
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You don't need insulin to be working perfectly for this to happen.
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The muscle contraction itself drives glucose into the muscle cells, which means
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that walking after meals specifically is one of the most effective ways to blunt the post-meal glucose back that would otherwise occur.
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Now, there was a study published in Diabetes Care, which found that three 15-minute walks after meals
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reduced your 24-hour blood glucose levels more effectively than a single 45-minute walk taken at another point in the day.
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So the timing really does matter.
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And this is something that we suggest all the time to our patients.
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And for people who are insulin resistant or pre-diabetic or trying to manage type 2 diabetes,
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and what we know is that 40% of you watching this will be in that sort of broad category, this is not a minor finding.
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It is genuinely a really powerful tool that costs nothing and has zero side effects.
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Consistently lower meal glucose means lower average insulin levels, less glycation damage to blood vessels,
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and over time, a really meaningful reduction in the metabolic drivers of chronic disease.
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Number four is all about your kidney health now.
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And from what I can gather, a lot of you watching these videos are really interested in the health of your kidneys, which is fantastic.
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So let's just talk about this one then.
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So there was a big study that followed over 6,000 people with chronic kidney disease.
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And it found
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that those who walked regularly had a significantly lower risk of progression to kidney failure compared to those who were sedentary, who didn't walk.
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even after controlling for all of the other important variables.
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And there are lots of different mechanisms at play here.
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So what we know is that regular walking reduces your blood pressure, which directly reduces the filtration pressure inside the glomalus,
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which is the tiny sort of filtering units in the kidney.
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And that reduced pressure slows the rate of kidney damage over time.
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Walking also improves your incident sensitivity and reduces your blood sugar, which as I just covered in the previous section, is one of the major drivers of kidney damage.
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And it reduces systemic inflammation as well, which is another independent driver of kidney disease progression.
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Now, the benefits here are largely indirect.
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They come through improvements in blood pressure, blood sugar and inflammation, but they are absolutely real and they have been tested again and again.
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So just check out the research papers in the description if you want to learn more.
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Number five is all about your liver this time.
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So non-alcoholic fatty liver disease is one of the most common liver conditions in the developed world,
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perhaps the most common, and it affects probably around 25 to 30 percent of adults, and most people who have it will never know.
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It develops when fat accumulates in the liver cells, initially causing no symptoms at all,
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but potentially progressing over years to inflammation and scarring and then possibly causing some pain later down the line.
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Eventually, it can even cause cirrhosis and liver failure.
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And one of the most effective interventions for it, backed by years and years of research, is regular aerobic exercise, including just plain boring walking.
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There was a systematic review published in the Journal of hepatology, which is a pretty important journal all about the liver.
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And it found that exercise interventions, including moderate intensity walking, significantly reduced the amount of liver fat,
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even in the absence of significant weight loss.
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And that's a really important point because it means that the liver benefits aren't just about losing weight.
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The movement itself has a direct metabolic effect on how the liver handles fat.
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We know that regular walking increases the rate at which the liver oxidizes fatty acids.
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It reduces the delivery of free fatty acids from fat tissue into the liver.
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And it improves insulin sensitivity, which is a common theme here, which reduces the fat-producing signaling that drives accumulation in the first place.
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So number six is that your joint health actually improves, despite what most people assume here.
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So most people think that walking can be bad for your joints, especially your knees, and that if you've got arthritis, then you should rest.
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But the evidence says pretty much the opposite.
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So cartilage, which you've all heard of, is the cushioning tissue inside your joint.
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It doesn't have its own blood supply.
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So the only way that it gets nutrients is from the fluid inside the joint.
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And that fluid only gets circulated when you move.
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So when joints start moving regularly, they become stiffer, less nourished, and more likely to break down over time.
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And not many people have ever been told this.
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There was this large long-term study called the Osteoarthritis Initiative, which followed thousands of people with or at risk of knee arthritis.
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And it found that people who walked regularly had less pain
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and less loss of function over time than those who didn't walk.
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And walking also builds up the muscles around your joints.
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So your quads, your glutes, your hips, And what we know is that stronger muscles around the joints means less pressure going directly through it.
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They're almost like shock absorbers.
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And what that does is that it protects the joints over time.
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So let's talk about muscles specifically now.
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So number seven.
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Now, as we get older, we naturally lose muscle.
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It's called sarcopenia.
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And I've mentioned this a few times in other videos in the past.
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Now, it's one of the main reasons people become frail, that they fall over and lose their independence as they become elderly.
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Now, let me just be really honest here.
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Walking isn't the same as lifting weights.
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And if you actually want to build muscle, then you need to do more than just walk.
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But for keeping the muscle that you've got, staying coordinated and slowing down that age-related decline, regular walking honestly makes a massive difference.
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There was a study in the American Journal of Clinical Nutrition
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that found that people who walked more each day held on to significantly more lean muscle mass over a four-year period
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compared to those who didn't.
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Now, part of that is metabolic.
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We know that walking helps your body to use insulin properly, which supports muscle maintenance.
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And the other side of it is that keeping your legs moving every single day, if you can, keeps this brain to muscle connection really sharp,
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which really matters for a lot of people as you get older in terms of balance and avoiding falls.
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Number eight is a really, really important one here.
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So what we know is that walking massively improves your mental health and your cognitive function.
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So the research on walking and mental health is really, really consistent.
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We know that it reduces depression, it reduces anxiety, improves your mood and it lowers your stress levels.
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And these are not small effects at all.
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There was an enormous study published in the British Journal of Sports Medicine,
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and it found significant reductions in depression scores from walking across multiple studies and multiple populations.
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And the reasons for this are partly chemical.
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We know that walking triggers the release of endorphins and endocannabinoids, which are the brain sort of natural mood-lifting compounds.
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And it also reduces your cortisol levels, which is your main stress hormone.
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Now, the other thing that it does is that it increases something called BDNF,
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brain derived neurotrophic factor, which is basically a fertilizer for your brain cells.
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And what it does is that it helps existing neurons survive and new ones to grow.
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And higher BDNF levels are linked to better memory, sharper thinking, and a lower risk of dementia across the board.
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It is really, really powerful stuff.
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The Framingham Heart Study, one of the longest running health studies in history,
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found that people who moved more had significantly lower rates of dementia over the long term.
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And as I said at the stars, the mood benefit is something that I've noticed firsthand over the past year with Mango.
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It's one of those things that sounds like a bit of a cliche until you actually feel the difference.
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Okay, so number nine is quite simply that you live longer.
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When you add all of those benefits together, so better heart health, lower blood pressure, better kidney and liver function,
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better joints, more muscle, better mental health, the overall effect on your lifespan is massive.
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A study published in JAMA Internal Medicine, and you can check out this study in the description below, it followed almost 5,000 older women.
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And it found that those walking around 7,500 steps a day had significantly lower death rates from all causes.
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Yes, all causes compared to those doing around 2,500.
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And the benefits seem to level off at around 7,500 steps, which is a really important point here.
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You don't need to be hitting 15,000, 20,000 steps a day.
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7,500 is achievable for most people.
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So there we are then, nine things that improve when you walk every day.
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I really hope I've convinced you of just how powerful it is.
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And what I want to do now is go through a sort of framework of how to actually implement all of this.
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What I found is that knowing that walking is actually good for you doesn't automatically make you do it.
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And most health videos don't really give you anything practical to work with.
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So here's how I would actually approach it if I wasn't walking every day.
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Now, the first thing to do is to actually find out where you are right now.
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How many steps do you do a day currently?
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There's a very good chance that your phone tracks this in the background.
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So look at your daily average from the last week if you can and use that as your starting point.
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If you don't have any data on this, then I would really recommend getting a really cheap fitness watch if you can.
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If you go onto Amazon or Google, just type in fitness watch.
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I can guarantee that something under £20 or $30 will come up.
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So once you know how many steps you're doing a day or a week.
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Just use that as your starting point.
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Now, if you're under 3,000 steps a day, the only goal for the next two weeks is to add one 10 to 15 minute walk per day.
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That's it.
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Starting small and building the habit gradually is what the evidence actually supports.
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After two weeks, that walk should feel pretty normal.
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It should be just part of your routine at this point.
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And then you add a second walk.
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And the best time to walk, for the blood sugar reasons that I mentioned earlier, is after a meal.
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Even just 10 minutes makes a really meaningful difference to your glucose levels.
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Now, the step target to aim for is roughly 7,000 to 8,000 per day for most people.
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Clearly, this will differ depending on your size, your age, how hilly it is where you live.
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But for most people, around 7,500 a day gives you enormous benefits.
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And for pace, you want to be moving briskly enough that talking is easy, but singing would be hard, that you're a tiny bit out of puff, but you're not breathing really hard,
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that you couldn't talk to your friend or your wife or husband or whoever.
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That is the sweet spot for your cardiovascular health and your metabolic health.
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Now, the last and probably the most important thing to mention here is that none of this works without consistency.
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One single good walk doesn't really change anything, but six weeks of daily consistent walking starts to.
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So the idea is that you wanna make it as easy as possible to build this into your routine, to show up every single day.
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So same time, pick a route you like, somebody to go with if that helps.
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And if you can, then get a Labrador.
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Honestly, getting a dog was one of the best things that we've done for our health as a family.
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Sobre esta lección
¿Qué es la Técnica de Shadowing?
Shadowing es una técnica de aprendizaje de idiomas respaldada por la ciencia, desarrollada originalmente para la formación de intérpretes profesionales y popularizada por el políglota Dr. Alexander Arguelles. El método es simple pero poderoso: escuchas audio en inglés nativo y lo repites en voz alta de inmediato, como una sombra que sigue al hablante con solo 1-2 segundos de retraso. A diferencia de la escucha pasiva o los ejercicios de gramática, el shadowing obliga a tu cerebro y músculos de la boca a procesar y reproducir simultáneamente patrones de habla reales. Las investigaciones muestran que mejora significativamente la precisión de la pronunciación, la entonación, el ritmo, el habla conectada, la comprensión auditiva y la fluidez al hablar, convirtiéndola en una de las metodologías más efectivas para la preparación del IELTS Speaking y la comunicación en inglés en el mundo real.