Thought that this might be of interest to others out there. I started c25k in June after having my son and quickly got addicted. After graduating and pushing up my times and distance I pulled my calf and was having trouble with my left hip. Tried physio, tried doing all the right things including not running for almost two weeks only to have the pain return immediately and then start in other calf. I almost cried but kept going and started back on w3. .. still sore.
anyway after reading a fair bit I thought about my running form and that calve aren't there to do all the work. I went out one morning and thought 'lift my legs. ..I am a prancing pony! '... and it worked. Minimal calf soreness hip fine and now back up to 30 min runs and finally feeling like my guys, hamstrings and quads are actually being used.
so moral of my long winded story - it's possible to run wrong and sometimes you can correct it and avoid injuries.