via fibre space
For the uninitiated: ICD is short-hand for the International Statistical Classification of Disease and Related Health Problems. Basically, it's a numerical classification system to describe the nature of your symptom or injury. And in the 10th update, there is a code just for knitting and crocheting injuries, inspiring the geniuses at fibre space to design this "no pain, no gain" series. Hey, if poker is considered a sport, I don't see why knitting couldn't be.