跟读练习: How stretching actually changes your muscles - Malachy McHugh - 通过YouTube学习英语口语
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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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背景与上下文
在这段视频中，演讲者Malachy McHugh探讨了拉伸对肌肉的影响。在运动员准备比赛前，拉伸是一个重要的环节，旨在预防受伤。然而，拉伸是否真能避免肌肉拉伤或撕裂呢？视频揭示了拉伸时身体发生的生理变化，以及不同类型的拉伸对肌肉的影响。通过了解这些信息，学习者可以在引导自己的运动与健康时更加得心应手，同时也能够增强用英语表达相关话题的能力。
日常沟通的五个重要短语
- 拉伸 (Stretching)
- 预防受伤 (Prevent injuries)
- 保持力量 (Maintain strength)
- 增加灵活性 (Increase flexibility)
- 动态与静态拉伸 (Dynamic and static stretches)
在练习这些短语时，可以尝试创建句子，进一步增强记忆和使用的流畅度。这有助于在翘首以待的日常对话或是雅思口语练习中，妥善运用这些术语。
逐步影子跟读指南
Shadow speech和shadowspeak是提高口语能力的有效方法。针对这段视频，以下是详细的逐步影子跟读指南，适合想通过 看YouTube学英语 和影子跟读技巧来提升英语水平的学习者：
- 听懂内容: 首先，观看视频并尽量理解整体内容。可以反复播放需要加强理解的部分。
- 分段练习: 将视频分成短小的段落，慢慢跟读。可以先跟读一段，再逐渐串联成完整内容。
- 模仿语调: 注意演讲者的语调和语速，尽量模仿。这会让你的发音更加自然。
- 记录并纠正: 录下自己的跟读，然后与视频进行比对，找出需要改进的地方。
- 定期重复: 持续进行这种练习，尤其是在提升运动相关英语表达时，保持频繁的练习至关重要。
通过这种影子跟读的方式，你不仅能够提高对运动及健康相关专业词汇的掌握，还能在 雅思口语练习 中更加自信地表达自己的观点与看法。
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。