My daughter is 25 now, and 5 years ago she broke her femur and had a titanium rod put in her leg. She's doing fine, and now she's taking tae kwando classes. She is not sure, however, if she should push herself to do kicks, etc., or to be careful not to put too much strain on her hip. She's not sure if she can increase her flexibility by pushing herself, or if she could do herself harm. How can she tell what could be helpful as opposed to what might to damage?