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  • You're running, here in the last quarter of the marathon.


  • You're a beast! You're a champion! You are incredible!


  • But then, suddenly, you feel this sharp pain in your side.


  • It seems to get worse and worse with every breath.


  • It is an attack of the side stitch!


  • And now you have to stop running for a while so it goes away.


  • But don't worry, you are not alone.


  • A study in the year 2000 found that 69% of runners had experienced a stitch, otherwise known as an exercise-related transient abdominal pain, in the last year.

    2000 年的一份研究指出,在過去一年期間,69% 的跑者都曾經經歷過側腹痛,又稱「運動急性胸肋痛(ETAP)」。

  • And people who exercised in other ways, like swimming or bike riding, also reported having gotten a stitch.


  • But even though they're so common, researchers aren't really sure where the pain comes from.


  • Remarkable that we don't know these things, even about our own bodiesone possibility is that it's all about your diaphragm, the domed-shaped muscle between your chest and abdomen.


  • When your diaphragm contracts, your lungs expand and fill with air.


  • When your diaphragm expands, your lungs get smaller and the air is forced back out.


  • But when you exercise, you might be overextending that muscle.


  • When you're running, for example, your foot consistently hits the pavement at the same time as you exhale.


  • When your diaphragm is at its highest and tightest, it might strain the diaphragm, causing it to spasm.


  • It could also be that forceful movement, like the up-and-down motion of running, bounces your internal organs around, straining the ligaments trying to keep them from sliding around inside youwhich is a really gross thought.


  • The most likely explanation seems to point to the peritoneum, a two-layered membrane that lines the abdominal wall and helps support your organs.


  • Now, normally, there's fluid in between the layers that make sure they don't scrape together too much.


  • Because when they do, you end up with that sharp pain.


  • When you eat a large meal, your stomach pushes out on the inner layer, and when you are dehydrated, like if you've been sweating a lot from exercising, there's less fluid between the layers.


  • The way your body is moving around might bump the layers against each other, too.


  • So, how do you make the pain go away?


  • First, just stop exercising for a bitthe pain will eventually pass.


  • Unless it doesn't, in which case, go see your doctor, because I'm not a doctor.


  • And if you want to make sure it doesn't happen again, it's probably worth listening to your mom's advice: Wait a little while after a big meal before jumping in the pool or going out for a run.


  • Working to strengthen your core might help, too.


  • That should reduce the movement in your abdomen while you're exercising, meaning less strain on your ligaments and membranes.


  • This way, your internal organs and all the stuff inside your abdominal cavity can stay right where it's supposed to be without causing stitches that might slow you down.


  • Thanks for asking and thanks especially to all of our patrons on Patreon who keep these answers coming.

    謝謝你們提出的問題,也謝謝在 Patreon 上的贊助者讓我們能持續回答這些問題。

  • If you would like to submit questions to be answered, and get these Quick Questions a few days before everybody else, you can go to

    如果你也有問題想問,或是想比其他人更早看到這些影片,你可以到 的網站上。

  • And don't forget to go to and subscribe!

    也別忘了看看並訂閱我們的 YouTube 頻道

You're running, here in the last quarter of the marathon.


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【生活小常識】為什麼跑步的時候身體側邊會有刺痛感? (What's Causing That Stitch in Your Side?)

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    Harvey Pan 發佈於 2021 年 06 月 21 日