Grade: 3
Bog standard calf strain, twanged sharply when running having been tight&sore before.
Coincided with a heavy cold, which would have stopped training for a week anyway..
Ran in new shoes one week later, then terrain.
Seemed like a 6-weeker, but just went away after a week and a hardish run (during which it was sore).
Just pulled a muscle between the ears? Maybe needed a change of shoes?