The hip is one of the most stable joints we possess, which at the same time is also quite mobile. It helps absorb shock and reduce the energy demand of standing. This requires many strong ligaments in order for the joint to remain stable. But it also has to be mobile, which means the strongest muscles are located in the hip, in order for them to be able to swing back and forth as a pendulum whilst walking or running.
If the muscles and ligaments don’t have proper teamwork, there’s a tendency to develop joint issues, which are deeply placed due to the location of the hip joint.