This nothing to do with WHW runner's highly informative dissertation on cow shooing.
I did try a run 2 days ago and it wasnt great. I did just over 2m and there was cetainly a reaction. So I will rest it another week
In the meantime I have done 30min on my bike (attached to turbotrainer) every day this week. My calf seems no worse after each session.
Unfortunately I wont be able to do the relay tomorrow.
Of course its all getting frustrating now and all the platitudes of a rest doing some good etc have worn off and its never a good time to have an injury.
Ah well KBO.