My 12 year old son does martial arts and did a full split facing forward. While in that position he attempted to turn sideways to do a different split turning upper body to the split placing head on right thigh amd injured his right hip. He s able to walk and run with no pain, but if he throws multiple side, or round house kicks his hip begins to hurt. We had x rays done and the Dr. said the bones look good and just to rest it. So we did and months later he has the same issue.