The iliofemoral joint is a diarthrotic joint that moves in all three planes of motion. Sitting,inactivity and poor posture causes tissues surrounding the hip to become dehydrated thus affecting it’s function and mobility. When this occurs, the low back and knees are at increased risk of injury.
https://instituteofmotion.com/wp-content/uploads/2017/09/Hip-mobility-and-ACL.pdf