Ok, this has never been a problem at all, but about a month ago, my left leg would get a little tingly if i was sitting down. i figured i may have pinched something towards my knee, since i would sit at the computer w/ my elbows on my knees. I have stopped doing that, and it went away after a couple days. but now it is back. my legs don't tingle, but when i sit down, my calf muscles twitch, and i didn't know what is causing it. when i am standing/walking, they are fine. If anyone knows anything about this, i.e. simmilar experience, or medical knowledge, i would appreciate some insight.