Name: What stretching actually does to your body ft. Sofie Dossi
Uploaded: 2022-07-18T08:37:58.000Z
Duration: 8 min 15 s
Description: VoiceTubeの動画で発音を聞きながら英語表現を覚えよう！学べる英語：

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So stay like this, and then lift up like this.

Use this momentum to kick your legs up even if you

And like bend your legs, and see if you can go

And last week, I got to hang out with contortionist

We did some science experiments for her channel.

And while we were hanging out, I realized that, as a physicist,

stretching does to your body and whether there

is a scientifically-supported way of becoming more flexible.

to meet with a bio mechanist to find out the latest science.

My first question was, is there something

There's evidence that people who are hyper flexible--

Hyper flexible or hypermobile is actually a scientific term.

And there is a test used to determine whether someone

link to it in the description if you want to test yourself.

Those people have a little bit more relatively

of the more stretchy collagen than the type I collagen.

I need a quick refresher on collagen. Take it away Michael.

So a bone to bone connection is a ligament.

And then a muscle to bone connection is the tendon.

of mostly collagen, which is a type of protein.

So tendons and ligaments have primarily type I collagen,

which is a really strong type, and then also some type III

and then may also include some elastin, which

So the ratios of those things can be different.

So Sophie might actually have a different material makeup

might have more of that type III collagen, which

would allow her to do things that the average person can't

Fact was, I almost can't overstretch anymore because I'm

So it's like I have pushed the limit on that,

Before I started contortion, I was always

But how do you get flexible biomechanically?

I guess my first question is, when you stretch,

what parts of your body are stretching out?

So when you stretch, you're going to increase flexibility

and excursion in all those tissues-- muscles, tendons,

The most short-term, the fastest, most acute effects

This is getting to the heart of what I really, really want

to know, which is, what is physically happening

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What stretching actually does to your body ft. Sofie Dossi

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