Hey bro,I have the same problem,when i juggle the ball and the ball goes to my left leg,my leg goes slightly to the left and i cant continue juggling and the ball falls.I feel that i have no power to left my leg when the ball approachess it.I've had this problem since October 2010 so more than a year ago and it still didnt improve,I dont want to put your hopes down or anything but tbh I felt your pain and anger in your posts cuz I had the experience of what you're going through. I wish that someday my juggling would come back to normal although I gave up many times,even I quit for more than half a year. Good luck with your injury and I hope everyone that suffers from it will get cured including myself.
Peace.