シャドーイング練習: What happens to your body at the top of Mount Everest - Andrew Lovering - YouTubeで英語スピーキングを学ぶ
C1
The Earth is a very difficult time.
⏸ 一時停止中
再生速度:
すべての文69 文
文が短すぎたり長すぎる場合は、Editをタップして調整してください。
1
The Earth is a very difficult time.
2
If someone teleported from sea level to the top of Mount Everest,
3
things would go bad fast.
4
At an altitude of 8,848 meters,
5
barometric pressure is approximately 33% of what it is at sea level.
6
This means there's significantly less oxygen in the air,
7
and our teleported individual would likely suffocate in minutes.
8
However, for people that make this same journey over the course of a month,
9
it's possible to survive at the peak for hours.
10
So what can happen to our bodies in just one month that allows us to endure this incredible altitude?
11
Let's imagine you're one of the 5.8 billion people living less than 500 meters above sea level.
12
When you take a breath at this altitude,
13
your lungs fill up with air composed of numerous gases and compounds.
14
Most important among these are oxygen molecules,
15
which bond to the hemoglobin in your red blood cells.
16
Blood then circulates throughout your body,
17
bringing essential oxygen to all your cells.
18
But as altitude increases, the air starts to get thinner.
19
The relative amounts of each compound remain the same well into the upper atmosphere.
20
But overall, there's less oxygen for our bodies to absorb.
21
And if you ascend to altitudes above 2,500 meters,
22
the resulting oxygen deprivation can cause a form of altitude sickness known as AMS,
23
often causing headaches, fatigue, and nausea.
24
Fortunately, AMS only happens when we ascend too fast,
25
because our bodies have numerous ways of adapting to high altitudes.
26
Within minutes or even seconds of reaching altitudes of 1,500 meters,
27
carotid chemoreceptors in your neck sense your blood's low oxygen pressure.
28
This triggers a response that increases the rate and depth of your breathing to counteract the lack of oxygen.
29
Your heart rate also increases,
30
and your heart contracts more tightly to pump additional blood with each beat,
31
quickly moving oxygenated blood around your body.
32
All these changes happen relatively fast,
33
and if you were to keep ascending,
34
your heart rate and breathing would speed up accordingly.
35
But if you've stayed at this altitude for several weeks,
36
you could reap the benefits of some longer-term adaptations.
37
Within the first few days above 1,500 meters,
38
the volume of plasma in your blood decreases,
39
which increases the concentration of hemoglobin.
40
Over the next two weeks,
41
your hemoglobin levels will continue to rise,
42
allowing your blood to carry even more oxygen per milliliter.
43
Paired with your high heart rate,
44
this new hemoglobin-rich blood efficiently distributes oxygen throughout your body,
45
so much so that the volume of blood being pumped with each heartbeat can return to normal levels.
46
Over this same time, your breathing also increases even further in a process called ventilatory acclimatization.
47
After this several weeks of extended acclimatization,
48
your body has made enough significant changes to climb even higher.
49
However, you'll still have to spend additional time acclimating along the way,
50
often climbing back down to recover before ascending even higher.
51
Because the summit of Everest isn't just high,
52
it's the highest place on Earth.
53
And at altitudes above 3,500 meters,
54
our bodies are under incredible stress.
55
Arteries and veins in the brain dilate to speed up blood flow,
56
but our smallest blood vessels,
57
called capillaries, remain the same size.
58
This increased pressure can cause blood vessels to leak,
59
and fluid to build up in the brain.
60
A similar issue can occur in the lungs,
61
where low oxygen causes blood vessels to constrict,
62
leading to more leaking vessels and fluid buildup.
63
These two conditions, known as HACE and HAPE,
64
respectively, are incredibly rare, but can be life-threatening if not dealt with quickly.
65
Some Tibetans and South Americans with family histories of living at high altitude have genetic advantages that can prevent minor altitude sickness.
66
But even they aren't immune to these severe conditions.
67
Yet despite these risks, climbers over the last century have proved people can go higher than scientists ever thought possible.
68
Pushing past their body's limitations,
69
these climbers have redefined what humanity can adapt to.
アプリをダウンロード
話したすべての文をAIが採点
TRENDING
人気動画
App StoreとGoogle Playで4.9/5
Shadowing English
モバイル版
Shadowing Englishアプリでいつでもどこでも英語を学びましょう。 今すぐコミュニケーションスキルを向上させましょう！
学習の進捗を追跡する
AIによる採点とエラー修正
豊富な動画ライブラリ
このレッスンについて
このレッスンでは、エベレスト山の頂上で体がどのように反応するかについて学びます。特に高所での酸素不足による影響や、体の適応過程を理解することで、英語のリスニングスキルと発音を向上させる良い機会です。映像の速度やリズムに合わせて練習することで、英語の発音を良くする手助けとなり、shadowspeakやshadow speechに慣れることができます。
重要な語彙とフレーズ
- 標高（ひょうこう） - Altitude
- 酸素（さんそ） - Oxygen
- 高山病（こうざんびょう） - Altitude sickness
- 心拍数（しんぱくすう） - Heart rate
- 血液（けつえき） - Blood
- 適応（てきおう） - Adaptation
- 脳（のう） - Brain
- 血管（けっかん） - Blood vessel
練習のヒント
映像のスピードとトーンに合わせて練習する際は、shadow speakを利用しましょう。具体的には、まず映像を見て全体の内容を理解した後、徐々に音声を真似ることをお勧めします。以下のアプローチを試してみてください。
- 映像を数回繰り返し見て、内容に慣れる。
- 重要な語彙やフレーズを声に出して練習する。特に、高山病や酸素の話を含む部分に注意を払いましょう。
- 自分の発音を録音して比較する。特に、心拍数や血液の循環に関する言葉をしっかりと発音する練習を。
- 映像のスピードで何度も練習することで、shadowspeaksに近づくことができます。
このプロセスを繰り返すことで、リスニング能力と発音を向上させるだけでなく、エベレストに関する興味深い科学的な知識も身につけることができます。
シャドーイングとは？英語上達に効果的な理由
シャドーイング（Shadowing）は、もともとプロの通訳者養成プログラムで開発された言語学習法で、多言語習得者として知られるDr. Alexander Arguelles によって広く普及されました。方法はシンプルですが非常に効果的：ネイティブスピーカーの英語を聞きながら、1〜2秒の遅延で声に出してすぐに繰り返す——まるで「影（shadow）」のように話者を追いかけます。文法ドリルや受動的なリスニングと異なり、シャドーイングは脳と口の筋肉が同時にリアルタイムで英語を処理・再現することを強制します。研究により、発音精度、抑揚、リズム、連音、リスニング力、そして会話の流暢さが大幅に向上することが確認されています。IELTSスピーキング対策や自然な英語コミュニケーションを目指す方に特におすすめです。