Recently I have started a program to strengthen(and learning to activate) specific muscles relating to overpronation(abductor hallucis, flexor digitorum brevis etc.).
After a few weeks I'm now able to activate and control these muscle but unfortunately only for <1-2 sec before the muscle/s contracts(hurts a bit) which forces me to stretch it out. This is substantially seen in the abductor hallucis muscle which forces the big toe to spread out before I align it to the 'normal'(not normal) position.
Is this normal? Do I need to incorporate stretch? Or will it go over over time?