Tony Horton and Grass Roots Fitness! grf admin July 6, 2012 Tony Horton and Grass Roots Fitness at the National Press Club. Tony Horton is an American fitness guru best known for the boot camp style P90X home fitness program. Bootcamp, Grass Roots Fitness, Tony Horton, VA, Vienna, virginia Team GRF – tackles the “Run Amuck” Recipes and Nutrition Plans