A ball and socket joint where we need the ball to stay centred in its socket.  It needs to stay in the centre so that the hip can both move freely and be free from pain.  Often due to the habit of hanging on one hip, or hanging on the front of your hips (it requires a lot less effort to stand this way!) …. the ball ends up at the front of the socket, and the problems start from there.  What problems?  Pain, stiffness and most certainly it can affect other body parts as well (especially the knee and the pelvis).  Some problems that we commonly see and treat are hip arthritis ( plus rehab after total hip replacements), Femeroacetabular Impingement (FAI), labral injuries (plus rehab after arthroscopies).