Range of motion defines how well you can move your hip as far as the hip joint was meant. A healthy hip joint can bend quit a bit and allow freedom for movement.
There are a few reasons why someone’s range of motion may be limited. It could be caused by pain (the more I move my joint, the more it hurts), swelling, clicking of the joint, or even stiffness around the joint.
If you are experiencing considerable limitations to the way your hip moves, you should see a doctor to see what can be done.