Suspension therapy involves using ropes and slings to support the body and limbs during passive or assisted exercises. There are three main types of suspension - axial, pendular, and vertical. Axial suspension moves the limb parallel to the floor from a joint as the point of suspension. Pendular suspension shifts the axis of movement to provide resistance. Vertical suspension supports the body part from its center of gravity. Suspension therapy aims to increase range of motion, muscle strength, and coordination through various techniques for individual joints like shoulder, elbow, hip, and knee.