
Born on this day
September 19, 20111931 - Brook Benton
1934 - Brian Epstein
1928 - Pete Murray
1933 - David McCallum
1940 - Zandra Rhodes
1940 - Bill Medley
1945 - Kate Adie
1946 - Michael Elphick
1948 - Jeremy Irons
1949 - Twiggy
1963 - David Seaman

When you run, you use more oxygen than you do when you’re walking or resting. If you aren’t able to compensate by pumping your blood faster and breathing more deeply, your tissues may start to feel oxygen deprived.
Fortunately, you aren’t out of options yet. Your spleen, which is in your abdomen, stores a small volume of blood which it can release into circulation on occassions like this. By increasing your circulating blood volume, you increase your “oxygen carrying capacity”–that is, you can carry more oxygen in your blood because there is more of it.
Cool, but what does that have to do with a stitch in my side you may ask. Well, in order to get that extra blood out and circulating, your spleen contracts. This squeezes the blood out–but it also feels uncomfortable, kind of like a muscle cramp. Or a stitch in your side.
Link to this question!

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