Pratique du Shadowing: How stretching actually changes your muscles - Malachy McHugh - Apprendre l'anglais à l'oral avec YouTube

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Here we have an athlete preparing for a game.
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They've put on their gear and done their warm-up,
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and now it's time for one more routine— stretching.
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Typically, athletes stretch before physical activity to avoid injuries like muscle strains and tears.
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But does stretching actually prevent these issues?
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And if so, how long do the benefits of stretching last?
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To answer these questions, we need to know what's actually happening in the body when we stretch.
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There are two kinds of stretching our athlete might be doing.
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Dynamic stretches, which are controlled movements that engage a range of muscles throughout the motion,
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and static stretches, where the stretcher holds a position to keep specific muscles at a fixed length and tension.
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Our athlete is currently doing a static hamstring stretch,
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a 30-second interval where he pulls his hamstring beyond its usual range of motion.
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However, while we often think of stretching a muscle like stretching a rubber band,
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muscles are actually comprised of various tissue types which interact to make a complex material.
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Rubber is elastic, meaning it resists being stretched and then returns to its original shape.
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But muscle is viscoelastic.
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This means that in addition to those elastic qualities,
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muscle changes under the stress of being stretched.
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Let's see this in action.
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At the large scale, this hamstring stretch is pulling on layers of protective tissue surrounding the muscle fibers,
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as well as the tendons that connect this muscle to nearby bones.
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These tissues contain elastic proteins like collagen and elastin,
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which allow them to slightly elongate over the duration of the stretch.
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At the smaller scale, these skeletal muscle fibers are comprised of millions of sarcomeres,
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the smallest contracting unit of muscle tissue.
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Sarcomere's long, fibrous proteins can relax to elongate muscle fibers,
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or they can contract to shorten them,
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pulling on tendons and protective tissue to create the force propelling our athlete's body.
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And when those tissues have been stretched out,
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they retain their strength at longer lengths,
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allowing our athlete to take full advantage of his improved range of motion.
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Unlike a rubber band, This muscle's resistance to stretching decreases with each 30-second stretch,
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allowing our athlete to continually elongate his hamstring.
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And this improved flexibility likely decreases the chance of incurring certain muscle injuries.
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But due to muscle's elastic properties,
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this effect will be gone in just 10 minutes without further activity.
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The exercise from his match should elevate his muscle's temperature continue elongating the muscle,
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maintaining his increased flexibility throughout the game.
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But once he gives his hamstrings a break,
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they'll retract back to their previous state.
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So if all this is just temporary,
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how can you permanently improve your flexibility?
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For skeletal muscles, improved flexibility comes from additional sarcomeres,
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which allow you to maintain strength at even greater lengths.
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Sarcomeres are added and subtracted to muscles,
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depending on how frequently they're used.
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So improving overall flexibility requires a comprehensive stretching regimen.
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Plus, you need to stretch often.
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Very often.
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Current research suggests at least 10 minutes a day for roughly two months.
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And since it's unsafe to hold any stretch for too long,
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it's recommended that you break up your stretching within any given session.
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Frequent stretching also makes lasting changes to your brain.
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The more you stretch a muscle,
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the higher your pain threshold becomes,
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allowing you to stretch further and further.
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Long-term improvements to your flexibility can provide a better range of motion for your joints,
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potentially reducing your risk of muscle injury in the short and long term.
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But it's also possible to stretch too much,
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as flexible people can move their joints in potentially dangerous ways.
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Stretching also isn't helpful for every kind of movement,
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especially those where muscle injuries aren't very common.
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For example, long-distance running only involves a small range of motion for the joints involved,
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so stretching is unlikely to prevent that sport's most common injuries.
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When it comes down to it,
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different lifestyles require different kinds of mobility,
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And no single stretching regimen is flexible enough to fit every situation.

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Why practice speaking with this video?

Engaging with the video "How stretching actually changes your muscles" by Malachy McHugh provides a valuable opportunity to enhance your English speaking skills. By listening to a knowledgeable speaker discussing a complex topic, you can familiarize yourself with scientific vocabulary and phrases that will improve your ability to discuss similar subjects. You might practice speaking by using a shadowing app that allows you to repeat sentences after the speaker, thereby improving your fluency and comprehension. This method is particularly useful for those preparing for IELTS speaking practice, as it helps build the confidence required to articulate thoughts clearly and coherently on a range of topics.

Grammar & Expressions in Context

Malachy McHugh utilizes various grammatical structures and expressions throughout the video that are valuable for English learners to grasp:

  • Present Simple Tense: "Here we have an athlete preparing for a game." This structure is commonly used to describe general truths and current activities.
  • Passive Voice: "Muscles are comprised of various tissue types." This construction shifts focus from the subject performing the action to the action itself, which is useful in scientific contexts.
  • Complex Sentences: "However, while we often think of stretching a muscle like stretching a rubber band, muscles are actually comprised of various tissue types." This provides an opportunity to learn how to connect ideas and contrasts effectively.
  • Modals: "This improved flexibility likely decreases the chance of incurring certain muscle injuries." Using modals like 'may', 'might', and 'could' can be essential for conveying possibilities and probabilities in discussions.

Common Pronunciation Traps

Pay attention to specific vocabulary that may pose pronunciation challenges, especially for non-native speakers:

  • Viscoelastic: This term may trip up speakers unfamiliar with scientific terminology due to its length and the combination of syllables.
  • Sarcomere: Make sure to pronounce this medical term correctly, emphasizing the second syllable ('car').
  • Elongate: This word is not only lengthy but also highlights the importance of stressing the right syllables for clarity.

Using a shadow speak approach can help you improve your pronunciation of these tricky terms, ensuring that you not only understand their meanings but also articulate them clearly when discussing scientific concepts in English. Regular practice, especially with a focus on such challenging words, can yield significant improvements in your English pronunciation.

Qu'est-ce que la technique du Shadowing ?

Le Shadowing est une technique d'apprentissage des langues fondée sur la science, développée à l'origine pour la formation des interprètes professionnels. Le principe est simple mais puissant : vous écoutez de l'anglais natif et le répétez immédiatement à voix haute — comme une ombre suivant le locuteur avec un décalage de 1 à 2 secondes. Les recherches montrent une amélioration significative de la précision de la prononciation, de l'intonation, du rythme, des liaisons, de la compréhension orale et de la fluidité.

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