Pratique du Shadowing: What actually makes muscles grow - Apprendre l'anglais à l'oral avec la vidéo
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104 phrases
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You don't build muscle at the gym.
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You break it there.
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The building happens after.
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While you're sitting at your desk.
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While you're sleeping.
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While you're doing absolutely nothing.
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And most people are completely screwing up that part.
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When you train, this is what's actually happening inside your muscles.
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Your brain sends a signal.
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Motor neurons fire.
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Muscle fibers contract.
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And when the load is heavy enough, your body recruits bigger, more powerful fibers, the ones with actual growth potential.
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Most people understand that part.
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What they get wrong is when muscle fiber is under load.
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Especially while it's lengthening, it physically deforms.
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The fiber senses that tension, triggers a molecular signal called MTORC1.
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And that signal tells your body to start building new protein, more protein, bigger fiber.
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That's hypertrophy.
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A 2025 review out of McMaster University, one of the top sports science programs in the world, confirmed that your muscle doesn't need to be torn to grow.
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It just needs to be loaded, which means it's the tension that does the work and not the damage you are so eager to flex.
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So that soreness you've been chasing?
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Inflammation.
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Your body is cleaning up.
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It's not a growth signal.
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Marathon runners are destroyed for a week after a race.
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They don't come back with bigger legs.
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Where it gets worse for you specifically is this next part.
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Muscle protein synthesis, the actual building process, peaks around 24 hours after your session.
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By 48 hours, it's basically back to baseline.
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Done.
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Window closed.
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So if you're training pull-ups on Monday and not touching your back again until next Monday, your muscles were growing for two days, then sitting there for five.
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That soreness you still feel on Thursday?
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That's just your body still doing cleanup while the construction crew already went home.
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Each muscle twice a week isn't just better.
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It's the difference between your muscles spending two days growing, or four.
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And the lowering part of every rep.
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That's where you're leaving the most on the table.
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Your muscles can handle about 40% more force on the way down than on the way up.
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The lowering phase of a pull-up, the descent of a dip.
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That's where the tension is highest.
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That's where MTORC1 gets hit hardest.
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Most people treat the lowering like it's the commute between reps.
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Drop down fast, pull up again, count the rep.
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But the rep you counted?
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Your muscles cared most about the part you rushed.
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Slow the lowering down, three seconds minimum.
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Your gains are going banana just from that one change.
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One bad night of sleep reduces muscle protein synthesis by 18%.
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Not a week of bad sleep.
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One night.
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One week of sleeping five hours drops your testosterone by 10 to 15 percent.
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Same decline you'd expect from aging 10 years, in one week.
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There was a study where two groups ate the exact same diet, same calorie deficit.
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The only difference was sleep.
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The group sleeping less lost 60% more muscle and 55% less fat.
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Same food, different results.
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You've been tracking your protein down to the gram.
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You slept 6 hours and scrolled until 1am.
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That's the problem.
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Sleep is half the recovery equation.
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The other half is protein.
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And most people are getting this wrong too.
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mTorq1 just told your body to build new muscle, but it needs raw materials.
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If your protein is off, that signal fires and nothing gets built.
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You basically paid for a construction crew and forgot to order the materials.
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The problem is most people have no idea how much they're actually eating.
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Studies show people underestimate their food intake by up to 50%.
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You think you're eating 2,000 calories.
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You're eating 3,000.
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Or the opposite.
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You think you're eating enough protein, but you're not.
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Macrofactor fixes this.
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It's a nutrition app that tracks your food, learns your metabolism, and adjusts your targets every week based on how your body is actually responding.
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It also adjusts every week.
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So if your metabolism slows down or speeds up, the plan moves with it.
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Not stuck on the numbers you entered on day one.
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It builds around you, not the other way around.
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A photologging makes it easy.
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Snap your plate, it calculates the macros.
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Use code YELLOWDUDE for a free 14-day trial.
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Link in the description.
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Load your muscles progressively, harder over time, not just more reps of the same thing.
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Body weight doesn't mean you can't progressively overload.
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Harder variations, slower eccentrics, weighted vest.
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Your muscles need increasing tension.
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Same pull-ups forever is not progressive overload.
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That's just maintenance.
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Slow the lowering phase on every rep, three seconds down every set.
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Sleep.
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Minimum seven hours.
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This isn't a lifestyle tip, it's literally where the growth happens.
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For the full breakdown of sets, frequency, how many days, we already covered that.
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Your soreness will peak around day two, and hang around until day three or four.
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Your muscles finished building around hour 48.
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They were done before your soreness even peaked.
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So next time you limp out of a session thinking you crushed it, you probably did.
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But the crushing part is over.
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What happens in the next 48 hours is the whole game, and most people spend those 48 hours sleeping badly,
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skipping protein, and waiting to feel less sore before they train again.
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Your muscles don't grow because they hurt, they grow because you loaded them, fed them, and got out of the way.
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Feed it right with the help of Macrofactor.
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Code YellowDude.
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Links in the description.
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Vocabulaire et conseils d’expression pour cette leçon
Cette leçon d’expression orale de niveau B2 s’appuie sur la vidéo « What actually makes muscles grow ». Les mots qui reviennent le plus souvent : muscle, protein, hour, rep, lowering. Cette vidéo contient 104 phrases et 913 mots à répéter en shadowing. La partie parlée dure 6:20. Le locuteur parle à un rythme régulier d’environ 144 mots par minute, confortable pour le shadowing. 82 % des mots font partie des 3 000 mots les plus courants en anglais ; le reste mérite d’être vu avant de commencer.
Vocabulaire clé de cette vidéo
Les 15 mots les plus avancés de la vidéo, avec leur prononciation et leur sens :
| Mot | Prononciation | Sens |
|---|---|---|
| overload verbe | /ˌəʊvəˈləʊd/ | surcharger |
| calorie nom | /ˈkæləɹi/ | calorie |
| metabolism nom | /məˈtæb.əˌlɪz.əm/ | métabolisme |
| synthesis nom | /ˈsɪnθəsɪs/ | synthèse |
| adjust verbe | /əˈd͡ʒʌst/ | ajuster |
| crush verbe | /kɹʌʃ/ | écraser, écrabouiller |
| deform verbe | /dəˈfɔɹm/ | déformer |
| hypertrophy nom | /haɪˈpɜɹ.tɹə.fi/ | hypertrophie |
| lengthen verbe | /ˈlɛŋθən/ | rallonger |
| neuron nom | /ˈn(j)ʊɹɑn/ | neurone, cellule nerveuse |
| eccentric adjectif | /ɪkˈsɛntɹɪk/ | excentrique |
| testosterone nom | /tɛˈstɑ.stəˌɹoʊn/ | testostérone |
| underestimate verbe | /ʌndɚˈɛs.tɪ.meɪt/ | sous-estimer |
| baseline nom | /ˈbeɪslaɪn/ | référence |
| macro nom | /ˈmæk.ɹoʊ/ | macro, macro-commande |
Les verbes à particule que vous entendrez
| Mot | Prononciation | Sens |
|---|---|---|
| pull up verbe | /ˌpʊl ˈʌp/ | soulever |
| clean up verbe | nettoyer | |
| hang around verbe | traîner | |
| slow down verbe | ralentir, décélérer | |
| speed up verbe | /spiːdˈʌp/ | accélérer |
Des phrases à répéter
Des phrases courtes et complètes de la vidéo, à réutiliser dans la conversation de tous les jours :
- You don't build muscle at the gym.
- While you're sitting at your desk.
- While you're doing absolutely nothing.
- So that soreness you've been chasing?
- That's where you're leaving the most on the table.
La grammaire de cette vidéo
Les structures que le locuteur utilise le plus, avec les mots exacts de la vidéo :
| Structure | Dans la vidéo |
|---|---|
| Present perfect continu have/has been + -ing — une action commencée avant et toujours en cours | you've been chasing · You've been tracking |
| Voix passive be + participe passé — l’accent est mis sur ce qui arrive, pas sur qui le fait | be torn · be loaded · are destroyed |
Prononciation à surveiller
Le locuteur utilise 21 contractions et formes réduites, comme you're, don't, doesn't. Prononcez-les sous leur forme courte, telles que vous les entendez.
- Les sons « th »: synthesis /ˈsɪnθəsɪs/, lengthen /ˈlɛŋθən/, marathon /ˈmæɹəθən/
- Les sons « sh » et « zh »: crush /kɹʌʃ/, inflammation /ɪnfləˈmeɪ̯ʃən/, equation /ɪˈkweɪ.ʒən/, variation /ˌvɛəɹiˈeɪʃn̩/, nutrition /njuːˈtɹɪʃ.ən/
- Mots longs — placez bien l’accent: progressively /pɹəˈɡɹɛsɪvli/, metabolism /məˈtæb.əˌlɪz.əm/, hypertrophy /haɪˈpɜɹ.tɹə.fi/, testosterone /tɛˈstɑ.stəˌɹoʊn/, underestimate /ʌndɚˈɛs.tɪ.meɪt/
Les sons difficiles pour les francophones :
- /r/ anglais — langue recourbée, sans frotter la gorge: progressively /pɹəˈɡɹɛsɪvli/, calorie /ˈkæləɹi/, crush /kɹʌʃ/, deform /dəˈfɔɹm/, hypertrophy /haɪˈpɜɹ.tɹə.fi/
Comment s’entraîner avec cette vidéo
- Écoutez la vidéo en entier une fois sans parler et notez les mots que vous ne connaissez pas.
- Répétez phrase par phrase à vitesse normale, en reprenant chacune jusqu’à ce que votre rythme corresponde à celui du locuteur.
- Enregistrez-vous et comparez avec l’original, en faisant attention à des mots comme overload, calorie, metabolism.
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.