Hi, I have sever nocturnal leg cramping ...Lt leg only. I don t know if I am waking first or the cramping is first? Seems to me, that as I try (in my sleep) to extend my foot, this brings on the cramping. There is no reason, no cause and affect...has me baffled. I am losing restorative sleep as a result. I have to get up and walk, you can actually hear my foot cracking???? Bewildered...sleepless in Maine....thank you in advance....