So, what is Hyrox? If Obstacle Course Racing, Marathons, and Crossfit had a baby, Hyrox would be it. It is the World series of fitness races consisting of 8, 1K runs split up by 8 set exercises. These movements are functional in nature which allows us to train our clients safely and efficiently. Our Hyrox race prep classes and PFT (Physical Fitness Test) events are meant to gear up participants for their next race and build functional movements patterns that everybody should be able to do.