シャドーイング練習: OBESITY (PODCAST) - IELTS TOPIC - YouTubeで英語スピーキングを学ぶ
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To be obese means to have too much fat on the body.
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To be obese means to have too much fat on the body.
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Obese people are not just overweight.
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Such people are likely to suffer health problems because of their weight.
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The precise cause of obesity is not clear.
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However, it is clear that obesity is a problem in most countries.
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One study estimated that about 55% of people in the United States are obese.
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People need to understand what obesity is and how to tell
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if they themselves are obese so that they can change their condition.
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An obese person does not have to look extremely fat.
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Even people who seem only slightly overweight can actually be considered obese.
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If a person has a certain amount of fat on their body,
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then their health might be in danger.
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This amount of fat is usually thought to be 40% of the body's total composition.
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Finding a person's exact fat percentage is troublesome.
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Most people still rely on their weight measurement to tell them if they are overweight or obese.
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There are problems with this method, however.
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There are recommended weights for different ages.
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In addition, weight alone says nothing about a person's percentage of body fat,
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which is most important.
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People have different body types,
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which can make weight measurements unreliable.
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For instance, athletes usually have more muscle mass than other people.
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Muscle weighs more than fat.
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Therefore, an athlete may weigh more than their recommended weight.
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But this does not mean they are not healthy.
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A more accurate measurement of body fat is needed.
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Probably the most popular method of determining body fat today is the Body Mass Index, BMI.
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BMI is a person's weight in kilograms divided by the square of his or her height in meters.
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For men, a BMI is a person's weight,
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in kilograms, divided by the square of his or her height, in meters.
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For men, a BMI of 24 to 27 is normal.
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For women, it is 23 to 26.
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A BMI of 30 or more means a person is obese.
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Many experts feel that BMI is a reliable way to determine if a person's weight is unhealthy.
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However, others feel that BMI is too general to be really useful.
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The numbers come from comparisons of large groups of people.
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It is not related to an individual's body composition.
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BMI says nothing about a person's actual percentage of body fat.
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There are many different ways that BMI can be affected by body shape and size.
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Muscular people may show a high BMI,
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even though they are perfectly healthy.
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Some people have higher bone density than others, which increases their weight.
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In some cases, those who have very low body fat
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and are also not muscular can have a BMI that is too high.
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BMI is also unreliable for children and the elderly.
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Even supporters of BMI think that it should not be used for people under 18 or over 70 years old.
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Despite these criticisms, there are strong positive aspects of BMI.
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The main one is that it is very simple.
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The measurement can be performed easily.
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It does not take special knowledge or equipment.
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Though BMI is a general measurement,
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it still gives useful information.
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At least, it can suggest that there might be a problem.
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Furthermore, some studies have shown that people with higher BMI numbers have a higher risk of health problems.
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It takes only a minute to get a BMI number,
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but the results can be very important to a person's life.
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この動画で話す練習をする理由は？
このポッドキャストは肥満についての専門的な話題を取り上げています。英語を学ぶ際に、特定のテーマに基づいた会話を練習することは非常に効果的です。特に健康や栄養のトピックは、日常生活でもよく語られるため、実践的な表現を身につけることができます。YouTubeで英語学習を通じて、このビデオの内容を通じて、医学や健康関連の語彙を増やしながら、英語で自分の意見を表現する能力を高めるチャンスです。英語シャドーイングを活用し、話す技術を向上させることで、より自信を持ってコミュニケーションを取れるようになります。
文法と表現の分析
このポッドキャストでは、以下の重要な文法構造や表現が使われています：
- 「to be obese means to have...」：この構造は「～であることを意味する」という表現方法で、英語の説明文でよく使われます。例えば、英語を学ぶときに自分の状況や条件を説明する際に役立ちます。
- 「It is clear that...」：このフレーズは意見を強調する際に役立ちます。話のポイントを明確にするために使える便利な表現です。
- 「Many experts feel that...」：この表現は意見の紹介に使われます。異なる見解を述べる際の良い例です。
- 「There are problems with...」：問題点を指摘するときに効果的な表現です。聞き手に重要な情報を伝えるのに適しています。
よくある発音の罠
このビデオには、英語を学ぶ際に注意が必要な発音のポイントがあります。特に「obesity」や「BMI」のような医学用語は、正確に発音することが重要です。また、特に「percent」や「composition」のような言葉は、スムーズに発音するには練習が必要です。英語シャドーイングを行う際には、こうした難しい単語を何度も繰り返すことで、発音の改善につながります。シャドースピーチのテクニックを使って、発音を正確に学ぶことで、リスニング力も向上します。
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。