About Us. Born in Australia, F45 Training was founded to offer consumers a practical, multi-disciplinary workout that integrated technology and community all in one place. Over a decade later, F45 is one of the world's fastest-growing fitness franchises that has proven to innovate, motivate, and produce results, with over 4,000 franchises sold in over 69 countries. Our mission is to create the world's greatest workout. Our mission at F45 is to cr...