While there are several different types of joints that differ in structure and the way they move, hinge joints are defined by their forward and backward motion, which allow them to move along one ...

The hip is a ball-and-socket joint, built for mobility in multiple directions. The knee, on the other hand, is a hinge joint that primarily moves forward and back. When your hips don’t move as ...

The knee is a hinge joint, made up of complex structures like soft tissues and ligaments that are easily injured. ‌ Repeated injuries or knee surgery can cause scar tissue to develop in the joint.

They cushion and lubricate, helping our bodies bend easily, quickly and without sounding like a rusty door hinge. Joints that don’t bend still need this cushion. The joints—and the sacs ...