Your hip is one of the largest weight-bearing joints in the body. This flexible joint can move forward, backwards, from side to side, and even twist, allowing you to walk, sit, bend, and turn.
This wide range of motion is possible because the hip, like your shoulder, is a ball-and-socket joint. The hip joint is where the ball-like top of your thigh bone (your femur) fits into a socket or cup-shaped hole in your pelvic bone.
To keep the hip joint moving smoothly, a complex network of bones, cartilage, muscles, ligaments, and tendons must all work together. This complex design creates a very stable joint with wide mobility.
While hips are strong, they can be injured through sports, running, overuse or falling.