跟读练习: What makes muscles grow? - Jeffrey Siegel - 通过YouTube学习英语口语
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Muscles. We have over 600 of them.
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Muscles. We have over 600 of them.
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They make up between 1/3 and 1/2 of our body weight, and along with connective tissue, they bind us together, hold us up, and help us move.
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And whether or not body building is your hobby, muscles need your constant attention because the way you treat them on a daily basis determines whether they will wither or grow.
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Say you're standing in front of a door, ready to pull it open.
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Your brain and muscles are perfectly poised to help you achieve this goal.
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First, your brain sends a signal to motor neurons inside your arm.
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When they receive this message, they fire, causing muscles to contract and relax, which pull on the bones in your arm and generate the needed movement.
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The bigger the challenge becomes, the bigger the brain's signal grows, and the more motor units it rallies to help you achieve your task.
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But what if the door is made of solid iron?
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At this point, your arm muscles alone won't be able to generate enough tension to pull it open, so your brain appeals to other muscles for help.
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You plant your feet, tighten your belly, and tense your back, generating enough force to yank it open.
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Your nervous system has just leveraged the resources you already have, other muscles, to meet the demand.
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While all this is happening, your muscle fibers undergo another kind of cellular change.
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As you expose them to stress, they experience microscopic damage, which, in this context, is a good thing.
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In response, the injured cells release inflammatory molecules called cytokines that activate the immune system to repair the injury.
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This is when the muscle-building magic happens.
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The greater the damage to the muscle tissue, the more your body will need to repair itself.
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The resulting cycle of damage and repair eventually makes muscles bigger and stronger as they adapt to progressively greater demands.
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Since our bodies have already adapted to most everyday activities, those generally don't produce enough stress to stimulate new muscle growth.
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So, to build new muscle, a process called hypertrophy, our cells need to be exposed to higher workloads than they are used to.
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In fact, if you don't continuously expose your muscles to some resistance, they will shrink, a process known as muscular atrophy.
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In contrast, exposing the muscle to a high-degree of tension, especially while the muscle is lengthening, also called an eccentric contraction, generates effective conditions for new growth.
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However, muscles rely on more than just activity to grow.
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Without proper nutrition, hormones, and rest, your body would never be able to repair damaged muscle fibers.
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Protein in our diet preserves muscle mass by providing the building blocks for new tissue in the form of amino acids.
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Adequate protein intake, along with naturally occurring hormones, like insulin-like growth factor and testosterone, help shift the body into a state where tissue is repaired and grown.
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This vital repair process mainly occurs when we're resting, especially at night while sleeping.
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Gender and age affect this repair mechanism, which is why young men with more testosterone have a leg up in the muscle building game.
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Genetic factors also play a role in one's ability to grow muscle.
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Some people have more robust immune reactions to muscle damage, and are better able to repair and replace damaged muscle fibers, increasing their muscle-building potential.
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The body responds to the demands you place on it.
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If you tear your muscles up, eat right, rest and repeat, you'll create the conditions to make your muscles as big and strong as possible.
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It is with muscles as it is with life: Meaningful growth requires challenge and stress.
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为何与此视频练习口语？
观看杰弗里·西格尔（Jeffrey Siegel）关于肌肉增长的演讲，能够帮助你在真实的语境中练习英语口语。通过跟随他的讲解，你可以学习到专业的术语和表达方式，结合视频中的信息，你不仅能够提高对内容的理解，还有助于提高英语发音，使你的口语表达更加自然和流畅。通过看YouTube学英语，你还可以学会如何在日常生活中应用这些科学知识，扩展你的词汇量及表达能力。
语法和表达结构分析
- 现在进行时：杰弗里使用“your brain and muscles are perfectly poised”这样的结构，介绍动作时的情境。当讲述肌肉如何运作时，这种时态能够加强信息的实时感。
- 条件句：“What if the door is made of solid iron?”此句展示了假设条件，能够激发思考并引导进一步讨论。
- 被动语态：“muscle fibers undergo another kind of cellular change”，在科学讨论中，被动语态常用于强调动作的结果而非施动者。
- 因果关系：“The greater the damage to the muscle tissue, the more your body will need to repair itself.”这样的句子结构有助于表明原因和结果之间的联系，并增强逻辑性。
理解这些语法结构可以帮助你在日常交流中更清晰地表达思想，加深对语言的掌握，提升你在shadowspeak方面的能力。
常见发音陷阱
在视频中，有一些词汇和发音挑战可能会让学习者感到困惑。例如，“muscles”这个词的发音，对于非母语者来说可能很难准确表达。此外，像“repair”与“require”这样的词，容易因元音的发音不同而混淆。注意这些细节不仅能提升你的发音，也能让你在与他人沟通时更加自信。
通过shadow speak的练习，你可以有效模仿这些难点，加深语言的印象，逐步提高自己的英语能力。
什么是跟读法？
跟读法 (Shadowing) 是一种有科学依据的语言学习技巧，最初开发用于专业口译员的培训，并由多语言者Alexander Arguelles博士普及。这个方法简单而强大：您在听英语母语原声的同时立即大声重复——就像是一个延迟1-2秒紧跟说话者的影子。与被动听力或语法练习不同，跟读法强迫您的大脑和口腔肌肉同时处理并模仿真实的讲话模式。研究表明它能显着提高发音准确性，语调，节奏，连读，听力理解和口语流利度——使其成为雅思口语备考和真实英语交流最有效的方法之一。