Phase IV was founded in 1980 by Robert Forster who started his business with a single client, Florence Griffith Joyner, who would be later known throughout the world for her Olympic gold medal achievements. Since then, Phase IV has worked with dozens of Olympic medalists, US Open and Wimbledon champions, NBA superstars and triathlon world record holders. Phase IV combines injury prevention and health maintenance programs with scientific training techniques; a sort of super-hybrid of personal training and health and maintenance program combination. Phase IV is located on 20th Street at the corner of Colorado Avenue (enter through the alley in the back of building), and their services are available to the general public.