Hey, I'm fairly new to folk style wrestling. I tried out for my high school and I think it's safe to say I was decent for a first year. Anyway, I have a chronic issue with my legs. when ever I bend my legs to make a transition to side mount, top mount, to take someones back, you name it; my hamstring at the knee joint feels as if its crossing. Like the ligaments cross each other and my leg locks up at a 90 degree angle. It really hurts and the only way I can fix it is to kick my leg out straight. It does a number on the back of my leg. Its really annoying. I'm not sure if its because I walk at 132 and cut to 125 which might make me too light or whatever. My coach wasn't sure what my problem was. I plan on doing brazilian jiu-jitsu very soon at a local gym( TEAM ROC ) and I want to be very successful doing BJJ. Can anyone help me out?