Last couple of runs I've had a stiffness and dull ache in the back of one lower leg, half way between the ankle and the calf, I'm guessing this is my Achilles but not sure.
It has coincided with new running shoes, following gait analysis I got a 'guidance' shoe (Brooks Ravenna) as I mildly over-pronate. Previous to this I had been running in neutral shoes which were not supporting my foot enough (I ended up with tendonitis in my foot which has gone since switching shoes).
Any thoughts or advice would be welcome, I have a 10k next month so could probably afford to rest a little now if necessary.