Knockout Fitness is the creation of Frank Wood. Frank has been active in the sport of boxing since 1991, when he began his amateur career through the United States Amateur Boxing Association. Trying to find a way to maintain the rigorous training and competition schedule of a boxer, Frank decided to open his own gym and offer his training regiment to the public.

In 1995, Knockout Fitness was created. Knockout Fitness had modest beginnings, starting in the basement of a rental house with limited equipment. But the demand for Frank's workout grew, as did his boxing career. In 1996 he turned professional and moved his operation to a larger facility. Frank has traveled throughout the US and internationally and retired in 2005 from boxing 26-4 (18 KO).

Knockout Fitness has grown into a 3,000 square foot fully equipped boxing gym in downtown Nashville. Some of boxing's greats have trained at Knockout Fitness including Felix Trindad, Riddick Bowe and Oliver McCall.