Suspension therapy involves suspending parts of the body using slings and pulleys to reduce friction and gravity. It aims to relax muscles, increase range of motion and strengthening. Key principles are pendulum movement which uses gravity for gentle oscillation, and reducing friction to allow for smooth movement. Common techniques suspend joints at points like the shoulder's acromion process or knee's lateral joint line to isolate muscles for exercises like flexion, extension, and rotation. Equipment includes suspension frames, supporting ropes, pulleys, slings and fasteners. Whole body suspension supports the entire body vertically.