What’s Causing That Stitch in Your Side?

What’s the deal with that sharp pain in your side when you’re trying to win that marathon? SciShow has the answers!

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Sources:
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4281377/
http://bjsm.bmj.com/content/37/4/287.full
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2796944/
http://www.businessinsider.com/what-are-side-stitches-2015-2

Images:
https://commons.wikimedia.org/wiki/File:Respiratory_system.svg
https://commons.wikimedia.org/wiki/File:Gray1035.png

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