Rambling notes about injuries

A few days ago it struck me that a lot of the people who I follow on Attackpoint get sick and injured a lot. A few years ago, I tried to see if I could predict injuries and illness. I picked out a few runners and each day I'd check their log, read what they wrote, and give it a score. I'm having trouble remembering all of the details, but the score was something really simple, like a 1-3 scale