Define cramp
A painful prolonged muscle spasm
What muscles commonly go into spasm
Gastrocnemius, soleus, hamstrings, quadratus lumborum, the intrinsic muscles of the back and sternocleidomastoid
What plantarflextion of the ankle shortens what muscle and may cause nocturnal calf cramps
Gastrocnemius
When having a gastrocnemius spasm how do you get rid of it?
By putting your ankle in dorsiflextion. That works the tibialis anterior muscle releasing the gastrocnemius.
Define spasm
Involuntary sustained contraction of a muscle