Grade: 3
Back spasm
Came on just after the USOC2015 meet in Kentucky. No obvious event associated with the spasm, but it followed an earlier wrestle with a wet kayak, a return flight to Japan, and the flight to Kentucky from Vancouver, all within a couple of weeks. Probably an aggregate response, intensified by some hard running on the Carter Caves map. Treated with TLC and Vit I.
Resolved after about a week.