Someone the other day was doing some exercises and his quadriceps muscle got a really bad cramp in it. So here’s what I did. I had him do this exercise.
I thought that might help because the exercise is to work out the quads. So using and contracting the muscle would then force it to relax when the exercise is over which would relieve the cramp. It helped.
But disclaimer: don’t take my advice, I have brain damage and probably don’t know what I’m talking about.