PNF (Proprioceptive Neuromuscular Facilitation) is an approach to therapeutic exercise which therapists all over the world have found effective for treating patients with a wide range of diagnoses. The approach presented here is based on the concepts set out by Dr. Herman Kabat and taught by Margaret Knott. The second edition adds many new illustrations including demonstrations of the techniques and pictures of actual patient treatment. The gait section has been expanded with an introduction to the components of normal gait and photos of patient treatment in gait. The mat section has also been enlarged and includes illustrations of patient treatment.