What makes this place unique? Gravity & Oxygen is a hybrid group fitness and personal training facility in Boca Raton, Florida. We work with individuals and athletes of all levels and abilities to provide RESULTS in all aspects of your life! What can first time customers expect by attending? The art of fitness is simple, if you allow it to be. If you had to define G+O approach in one sentence, we are a cardiovascular interval training and resistance training circuit program with an intelligent design and a sizzle of flair.