Hi,

I get cramp/spasms in my calf muscles when running hard on the hills. Does anyone know what might cause this, and how I can stop it happening? Or is it just a lack of practice on the hills?

It generally happens when I have to stretch or jump to get over something, then I need to stop and stretch the muscle right out. I then complete my run at a slightly slower pace, with the fear that it might happen again, possibly leading to me landing like a sack of potatoes on the ground as my leg gives way underneath me!