Subjective Information - Information that is gathered from a prospective client to give the health and fitness professional feedback regarding personal history such as occupation, lifestyle and medical background. Program Design - A purposeful system or plan put together to help an individual achieve a specific goal. Biomechanics - A study that uses principals of physics to quantitatively study how forces interact within a living body. Dietary Supplement - A substance that completes or makes an addition to daily dietary intake. Proprioceptively enriched environment - An unstable (but controlled) environment where exercises are performed that causes the body to use its internal balance and stabilization mechanisms Reactive Training - Exercises that use quick, powerful movements involving an eccentric contraction immediately followed by an explosive concentric contraction. Obesity - Fastest growing health problem in the US The Nervous System - It is a conglomeration of billions of cells forming nerves that are specifically designed to provide a communication network within the human body nervous system, skeletal system and muscular system - kinetic chain Heart - Muscular pump that rhythmically contracts to push blood throughout the body Dynamic Joint Stabilization - The ability of the kinetic chain to stabilize a joint during movement. Speed - The ability to move the body in one intended direction as fast as possible. The Core - The lumbo-pelvic -hip complex and the thoracic and cervical spine, where the body's center of gravity is located Flexibility - The normal extensibility of all soft tissues that allow the full range of motion of a joint. Nutrition - The sum of the processes by which an animal or plant takes in and uses food substances.