Multimotion KAFO is an orthosis that creates a low-load, long duration stretch on the hamstrings behind the knee and the knee flexors. The Multimotion has a dynamic joint with adjustable tension that allows the motion of the knee joint, but as the muscles relax it begins to stretch the joint again. The rate of the spring tension is constant and independent of the angle of the joint. This orthosis is used to treat e.g. muscle weakness, deformities, spasticity, articulation or muscle contractures and stiffness.