You get dead legs all the time what is it?

i have snapping hip syndrome because i have tight ITB which is the thigh mussel's. so i presumed i just had bad leg mussels and they go now and then but i then noticed i got it when i got angry or upset, E.G i seen someone fall in the street, i then got a dead leg. i researched this and found it could be CATAPLEXY = C , i also get the hole body shutting down with this though, but the majority its both legs, i had the legs going for about a year before the full cataplexy attacks tho so watch out and see if you can notice any emotions linking in with when you get the dead, legs...... hope it helped xx