Mystery #2Tier 2breathing and exercise
Why do you sometimes get that sharp stabbing stitch in your side when running?
You're running along happily when suddenly a sharp, stabbing pain jabs you in the side, low down near your ribs. You slow to a walk, press the spot, and after a while it fades. Why does hard running sometimes give you a stitch?
Your guess
What do you think is happening in your side to cause that sharp stitch?
There's no single magic word to type, have a go in your own words, then reveal the answer to see how close you got.
Make a guess to unlock the hints and the answer.