I spent some time with my fizzio yesterday and the upshot is that I can't plod for a while, not even cycle :0(A torn calf muscle has seen to that.But he has shed some light on why it keeps happening and all I may have to do is take more salt/magnesium in future. Apparently the cramp I've been getting while running has been so severe its tearing the muscle. He thinks I am sweating out the salt and not replacing it enough when I am on LSRs and that's causing the problems. I don't use salt for cooking or adding to food normally and although I drink plenty, it hasn't got salt added.
Plus some strengthening excercises of course.It would be good if it could be remedied that easily so I will be giving it a try.Yuk!
He did also mention a couple of other reasons I could be cramping up like this but the salt one is the easiest to remedy so I am going along with that for now. (compartment syndrome and thick blood were mentioned)
In the meantime, I will be trying to find something else to do and hope I don't lose too much fitness. Don't know what though!