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Here's what happens to your knuckles when you crack them

Recognize this sound?

to recognize - распознать, признавать, узнавать, осознать

If you pop or crack your joints, you probably do.

to pop - хлопнуть

What happens to our joints when we crack them?

joint - сустав
to crack - трескать

And is it bad for you?

Synovial fluid is this lubricant-like substance

fluid - жидкость
substance - вещество, субстанция
lubricant - смазка

that's found in between your joints.

between - между

It kind of looks like an egg yolk.

egg yolk - яичный желток

So when you stretch out your joint,

to stretch out - протягивать, растягивать

you are releasing gas,

to release - выпустить
gas - газ

and that gas forms a bubble and it collapses and pops.

bubble - пузырь
to collapse - рушиться, сжиматься

In order to crack the same knuckle again,

in order to - для того что бы....
knuckle - сустав пальца

you have to wait about 20 minutes for the gas to return back to that fluid.

So how is that different from a pop you hear when you stand up quickly?

different - другой, различный
to stand up - вставать
quickly - быстро, скоро

The sound you're probably hearing then is

probably - вероятно, наверное

the snapping sound tendons make when slide between muscles or over bones.

to slide - скользить
muscle - мускул
bone - кость

When a joint moves, the tendon snaps quickly over

tendon - сухожилие
to snap - щелкать

and it makes a popping sound.

So is the knuckle cracking habit safe?

habit - привычка


Donald Unger was sort of a self-described researcher who chose to pop

researcher - исследователь
to choose - выбирать

the joints in one of his hands for 60 years, but not the other one.

hand - рука

And he wanted to find out

to find out - выяснить, выяснять

if popping your knuckles would actually give you arthritis.

actually - действительно; фактически; на самом деле;

After 60 years of doing it, he found that

he didn't have any more arthritis in one hand than in the other.

Most medical sources agree with this findings.

medical - медицинский, врачебный
source - источник
to agree - соглашаться
findings - выводы

But there's still a chance it's not good for you.

chance - шанс, возможность

One 1990 study did find that cracking your knuckles over a long period of time

period - период

led to hand swelling and decreased grip strength,

to lead - вести, приводить
swelling - припухлость, напухание
to decrease - уменьшать(ся), убывать
grip - рукоять

but there hasn't been any follow-up research on that.

So while cracking your knuckles might not be bad for you,

there's still no guarantee

guarantee - гарантия

that your popping habit won't annoy the people around you.

to annoy - раздражать, бесить