The launch of one of the most innovative products the fitness industry has seen turned out to be just the start for a company that continues to expand, shape, and define functional training. Invented by David Weck, the BOSU Balance Trainer debuted in 2000 and quickly became one of the most successful fitness training products in the world. Originally, the name "BOSU" was an acronym for "Both Sides Up." It meant that the BOSU Balance Trainer could be used on either side, the dome or the platform. Today, "BOSU" has evolved beyond the product to now mean "Both Sides Utilized," an approach to exercise that represents how the human body is designed to move and function most efficiently. The principles of balance training; control of the left and right sides of the body and the efficient timing of down/up movement inspired the development of additional BOSU products and programming.