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B1 中級 英語 5:03 Educational

How stretching actually changes your muscles - Malachy McHugh

TED-Ed · 11,798,128 回視聴 · 追加日 3週間前

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B1

CEFRレベル

5/10

難易度

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00:06

Here we have an athlete preparing for a game.

00:09

They’ve put on their gear and done their warmup,

00:12

and now it’s time for one more routine— stretching.

00:16

Typically, athletes stretch before physical activity to avoid injuries

00:20

like muscle strains and tears.

00:22

But does stretching actually prevent these issues?

00:25

And if so, how long do the benefits of stretching last?

00:30

To answer these questions,

00:31

we need to know what's actually happening in the body when we stretch.

00:35

There are two kinds of stretching our athlete might be doing.

00:39

Dynamic stretches, which are controlled movements

00:41

that engage a range of muscles throughout the motion.

00:44

And static stretches, where the stretcher holds a position

00:47

to keep specific muscles at a fixed length and tension.

00:51

Our athlete is currently doing a static hamstring stretch—

00:55

a 30 second interval where he pulls his hamstring

00:59

beyond its usual range of motion.

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