Cushions and seating are powered or non-powered devices placed on a wheelchair or other seating surfaces. They utilize air, fluid, foam, gel, water, wool or a combination of these components to distribute pressure and reduce friction and shear forces.
PNF stands for Proprioceptive Neuromuscular Facilitation. This type of stretching is often referred to as partner stretching because two people are needed to perform the movements. There are many forms of PNF, but most involve an isometric hold followed by a static stretch of the same muscle group.
Dynamic stretches are those that are performed using a dynamic movement to gradually warm up your muscles and increase your range of motion. It is therefore no surprise that this type of stretching is used to improvedynamic flexibility which is what you use when you run and jump.